diff --git a/utils/actions.js b/utils/actions.js
index 9bdb2e1..6673476 100644
--- a/utils/actions.js
+++ b/utils/actions.js
@@ -55,7 +55,7 @@ function ProcessIncomingRequest (data) {
     var d = JSON.parse(data)
     var allQuestions = []
     for (let i = 0; i < d.allData.length; i++) {
-      allQuestions.push(new classes.Question(d.allData[i].Q, d.allData[i].A, d.allData[i].I))
+      allQuestions.push(new classes.Question(d.allData[i].Q, d.allData[i].A, d.allData[i].data))
     }
 
     let color = logger.GetColor('green')
@@ -69,7 +69,7 @@ function ProcessIncomingRequest (data) {
     if (d.data.length > 0) {
       let qdb = LoadJSON(utils.ReadFile(dataFile))
       d.data.forEach((x) => {
-        let q = new classes.Question(x.Q, x.A, x.I)
+        let q = new classes.Question(x.Q, x.A, x.data)
         questions.push(q)
         qdb.AddQuestion(d.subj, q)
       })
@@ -116,7 +116,7 @@ function LoadJSON (resource) {
       var j = 0
       for (j = 0; j < d.Subjects[i].Questions.length; j++) {
         var currQ = d.Subjects[i].Questions[j]
-        s.AddQuestion(new classes.Question(currQ.Q, currQ.A, currQ.I))
+        s.AddQuestion(new classes.Question(currQ.Q, currQ.A, currQ.data))
       }
       rt.push({
         name: d.Subjects[i].Name,
diff --git a/utils/dataUpdater.js b/utils/dataUpdater.js
index 333555e..be22220 100644
--- a/utils/dataUpdater.js
+++ b/utils/dataUpdater.js
@@ -18,7 +18,411 @@
 
  ------------------------------------------------------------------------- */
 
-const classes = require('./question-classes/classes.js')
+const commonUselessAnswerParts = [
+  'A helyes válasz az ',
+  'A helyes válasz a ',
+  'A helyes válaszok: ',
+  'A helyes válaszok:',
+  'A helyes válasz: ',
+  'A helyes válasz:',
+  'The correct answer is:',
+  '\''
+]
+const commonUselessStringParts = [',', '\\.', ':', '!', '\\+']
+const specialChars = [ '&', '\\+' ]
+const lengthDiffMultiplier = 10 /* Percent minus for length difference */
+const minMatchAmmount = 60 /* Minimum ammount to consider that two questions match during answering */
+
+const assert = (val) => {
+  if (!val) { throw new Error('Assertion failed') }
+}
+
+class StringUtils {
+  RemoveStuff (value, removableStrings, toReplace) {
+    removableStrings.forEach((x) => {
+      var regex = new RegExp(x, 'g')
+      value = value.replace(regex, toReplace || '')
+    })
+    return value
+  }
+
+  SimplifyQuery (q) {
+    assert(q)
+
+    var result = q.replace(/\n/g, ' ').replace(/\s/g, ' ')
+    return this.RemoveUnnecesarySpaces(result)
+  }
+
+  ShortenString (toShorten, ammount) {
+    assert(toShorten)
+
+    var result = ''
+    var i = 0
+    while (i < toShorten.length && i < ammount) {
+      result += toShorten[i]
+      i++
+    }
+    return result
+  }
+
+  ReplaceCharsWithSpace (val, char) {
+    assert(val)
+    assert(char)
+
+    var toremove = this.NormalizeSpaces(val)
+
+    var regex = new RegExp(char, 'g')
+    toremove = toremove.replace(regex, ' ')
+
+    return this.RemoveUnnecesarySpaces(toremove)
+  }
+
+  // removes whitespace from begining and and, and replaces multiple spaces with one space
+  RemoveUnnecesarySpaces (toremove) {
+    assert(toremove)
+
+    toremove = this.NormalizeSpaces(toremove)
+    while (toremove.includes('  ')) {
+      toremove = toremove.replace(/ {2}/g, ' ')
+    }
+    return toremove.trim()
+  }
+
+  // simplifies a string for easier comparison
+  SimplifyStringForComparison (value) {
+    assert(value)
+
+    value = this.RemoveUnnecesarySpaces(value).toLowerCase()
+    return this.RemoveStuff(value, commonUselessStringParts)
+  }
+
+  RemoveSpecialChars (value) {
+    assert(value)
+
+    return this.RemoveStuff(value, specialChars, ' ')
+  }
+
+  // if the value is empty, or whitespace
+  EmptyOrWhiteSpace (value) {
+    // replaces /n-s with "". then replaces spaces with "". if it equals "", then its empty, or only consists of white space
+    if (value === undefined) { return true }
+    return (value.replace(/\n/g, '').replace(/ /g, '').replace(/\s/g, ' ') === '')
+  }
+
+  // damn nonbreaking space
+  NormalizeSpaces (input) {
+    assert(input)
+
+    return input.replace(/\s/g, ' ')
+  }
+
+  CompareString (s1, s2) {
+    if (!s1 || !s2) {
+      return 0
+    }
+
+    s1 = this.SimplifyStringForComparison(s1).split(' ')
+    s2 = this.SimplifyStringForComparison(s2).split(' ')
+    var match = 0
+    for (var i = 0; i < s1.length; i++) {
+      if (s2.includes(s1[i])) { match++ }
+    }
+    var percent = Math.round(((match / s1.length) * 100).toFixed(2)) // matched words percent
+    var lengthDifference = Math.abs(s2.length - s1.length)
+    percent -= lengthDifference * lengthDiffMultiplier
+    if (percent < 0) { percent = 0 }
+    return percent
+  }
+
+  AnswerPreProcessor (value) {
+    assert(value)
+
+    return this.RemoveStuff(
+      value, commonUselessAnswerParts)
+  }
+
+  // 'a. pécsi sör' -> 'pécsi sör'
+  RemoveAnswerLetters (value) {
+    assert(value)
+
+    let s = value.split('. ')
+    if (s[0].length < 2 && s.length > 1) {
+      s.shift()
+      return s.join(' ')
+    } else {
+      return value
+    }
+  }
+
+  SimplifyQA (value, mods) {
+    if (!value) { return }
+
+    const reducer = (res, fn) => {
+      return fn(res)
+    }
+
+    return mods.reduce(reducer, value)
+  }
+
+  SimplifyAnswer (value) {
+    return this.SimplifyQA(
+      value,
+      [
+        this.RemoveSpecialChars.bind(this),
+        this.RemoveUnnecesarySpaces.bind(this),
+        this.AnswerPreProcessor.bind(this),
+        this.RemoveAnswerLetters.bind(this)
+      ])
+  }
+
+  SimplifyQuestion (value) {
+    return this.SimplifyQA(
+      value,
+      [
+        this.RemoveSpecialChars.bind(this),
+        this.RemoveUnnecesarySpaces.bind(this)
+      ])
+  }
+
+  SimplifyStack (stack) {
+    return this.SimplifyQuery(stack)
+  }
+}
+
+const SUtils = new StringUtils()
+
+class Question {
+  constructor (q, a, i) {
+    this.Q = SUtils.SimplifyQuestion(q)
+    this.A = SUtils.SimplifyAnswer(a)
+    this.I = i
+  }
+
+  toString () {
+    var r = '?' + this.Q + '\n!' + this.A
+    if (this.I) { r += '\n>' + this.I }
+    return r
+  }
+
+  HasQuestion () {
+    return this.Q !== undefined
+  }
+
+  HasAnswer () {
+    return this.A !== undefined
+  }
+
+  HasImage () {
+    return this.I !== undefined && (typeof this.I === 'string' || Array.isArray(this.I))
+  }
+
+  IsComplete () {
+    return this.HasQuestion() && this.HasAnswer()
+  }
+
+  Compare (q2, i) {
+    assert(q2)
+
+    if (typeof q2 === 'string') {
+      var qmatchpercent = SUtils.CompareString(this.Q, q2)
+
+      if (i === undefined || i.length === 0) { return qmatchpercent } else {
+        if (this.HasImage()) {
+          const imatchpercent = this.HasImage() ? SUtils.CompareString(this.I.join(' '), i.join(' '))
+            : 0
+          return (qmatchpercent + imatchpercent) / 2
+        } else {
+          qmatchpercent -= 30
+          if (qmatchpercent < 0) { return 0 } else { return qmatchpercent }
+        }
+      }
+    } else {
+      const qmatchpercent = SUtils.CompareString(this.Q, q2.Q)
+      const amatchpercent = SUtils.CompareString(this.A, q2.A)
+      if (this.I !== undefined) {
+        const imatchpercent = this.I === undefined ? SUtils.CompareString(this.I.join(' '), q2.I.join(
+          ' ')) : 0
+        return (qmatchpercent + amatchpercent + imatchpercent) / 3
+      } else {
+        return (qmatchpercent + amatchpercent) / 2
+      }
+    }
+  }
+}
+
+class Subject {
+  constructor (n) {
+    assert(n)
+
+    this.Name = n
+    this.Questions = []
+    this.active = false
+  }
+
+  setIndex (i) {
+    this.index = i
+  }
+
+  getIndex () {
+    return this.index || -1
+  }
+
+  get length () {
+    return this.Questions.length
+  }
+
+  markActive () {
+    this.active = true
+  }
+
+  getIfActive () {
+    return this.active
+  }
+
+  AddQuestion (q) {
+    assert(q)
+
+    this.Questions.push(q)
+  }
+
+  getSubjNameWithoutYear () {
+    let t = this.Name.split(' - ')
+    if (t[0].match(/^[0-9]{4}\/[0-9]{2}\/[0-9]{1}$/i)) {
+      return t[1] || ''
+    } else {
+      return ''
+    }
+  }
+
+  getYear () {
+    let t = this.Name.split(' - ')[0]
+    if (t.match(/^[0-9]{4}\/[0-9]{2}\/[0-9]{1}$/i)) {
+      return t
+    } else {
+      return ''
+    }
+  }
+
+  Search (q, img) {
+    assert(q)
+
+    var r = []
+    for (let i = 0; i < this.length; i++) {
+      let percent = this.Questions[i].Compare(q, img)
+      if (percent > minMatchAmmount) {
+        r.push({
+          q: this.Questions[i],
+          match: percent
+        })
+      }
+    }
+
+    for (let i = 0; i < r.length; i++) {
+      for (var j = i; j < r.length; j++) {
+        if (r[i].match < r[j].match) {
+          var tmp = r[i]
+          r[i] = r[j]
+          r[j] = tmp
+        }
+      }
+    }
+
+    return r
+  }
+
+  toString () {
+    var r = []
+    for (var i = 0; i < this.Questions.length; i++) { r.push(this.Questions[i].toString()) }
+    return '+' + this.Name + '\n' + r.join('\n')
+  }
+}
+
+class QuestionDB {
+  constructor (getVal, setVal) {
+    this.Subjects = []
+    this.getVal = getVal
+    this.setVal = setVal
+  }
+
+  get length () {
+    return this.Subjects.length
+  }
+
+  get activeIndexes () {
+    var r = []
+    for (var i = 0; i < this.length; i++) {
+      if (this.getVal('Is' + i + 'Active')) {
+        r.push(i)
+      }
+    }
+    return r
+  }
+
+  GetIfActive (ind) {
+    return this.getVal('Is' + ind + 'Active')
+  }
+
+  ChangeActive (i, value) {
+    this.setVal('Is' + i + 'Active', !!value)
+  }
+
+  AddQuestion (subj, q) {
+    assert(subj)
+
+    var i = 0
+    while (i < this.Subjects.length && this.Subjects[i].Name !== subj) { i++ }
+    if (i < this.Subjects.length) { this.Subjects[i].AddQuestion(q) } else {
+      const n = new Subject(subj)
+      n.AddQuestion(q)
+      this.Subjects.push(n)
+    }
+  }
+
+  Search (q, img) {
+    assert(q)
+
+    var r = []
+    for (let i = 0; i < this.length; i++) {
+      if (this.GetIfActive(i)) { r = r.concat(this.Subjects[i].Search(q, img)) }
+    }
+
+    for (let i = 0; i < r.length; i++) {
+      for (var j = i; j < r.length; j++) {
+        if (r[i].match < r[j].match) {
+          var tmp = r[i]
+          r[i] = r[j]
+          r[j] = tmp
+        }
+      }
+    }
+
+    return r
+  }
+
+  AddSubject (subj) {
+    assert(subj)
+
+    var i = 0
+    while (i < this.length && subj.Name !== this.Subjects[i].Name) { i++ }
+
+    if (i < this.length) {
+      this.Subjects.concat(subj.Questions)
+    } else {
+      this.Subjects.push(subj)
+    }
+  }
+
+  toString () {
+    var r = []
+    for (var i = 0; i < this.Subjects.length; i++) { r.push(this.Subjects[i].toString()) }
+    return r.join('\n\n')
+  }
+}
+
+module.exports.StringUtils = StringUtils
+module.exports.Question = Question
+module.exports.Subject = Subject
+module.exports.QuestionDB = QuestionDB
 const utils = require('./utils.js')
 
 Main()
@@ -56,7 +460,7 @@ function RefactorDb (db) {
       if (question.I) {
         question.data = {
           type: 'image',
-          images: question.I
+          images: typeof question.I === 'string' ? JSON.parse(question.I) : question.I
         }
         delete question.I
       } else {
@@ -126,15 +530,15 @@ function GetParams () {
 
 function ParseJSONData (data) {
   var d = JSON.parse(data)
-  var r = new classes.QuestionDB((x) => true, (x, y) => console.log(x, y))
+  var r = new QuestionDB((x) => true, (x, y) => console.log(x, y))
   var rt = []
 
   for (var i = 0; i < d.Subjects.length; i++) {
-    let s = new classes.Subject(d.Subjects[i].Name)
+    let s = new Subject(d.Subjects[i].Name)
     var j = 0
     for (j = 0; j < d.Subjects[i].Questions.length; j++) {
       var currQ = d.Subjects[i].Questions[j]
-      s.AddQuestion(new classes.Question(currQ.Q, currQ.A, currQ.I))
+      s.AddQuestion(new Question(currQ.Q, currQ.A, currQ.I))
     }
     rt.push({
       name: d.Subjects[i].Name,
@@ -147,11 +551,11 @@ function ParseJSONData (data) {
 
 function ReadData (data) {
   const d = data.split('\n')
-  const r = new classes.QuestionDB((x) => true, (x, y) => console.log(x, y))
+  const r = new QuestionDB((x) => true, (x, y) => console.log(x, y))
   var logs = []
   var currSubj = '' // the current subjects name
   var ExpectedIdentifier = ['+', '?']
-  let currQuestion = new classes.Question()
+  let currQuestion = new Question()
 
   var i = -1
   while (i < d.length) {
@@ -175,7 +579,7 @@ function ReadData (data) {
 
     if (currIdentifier === '+') {
       if (currQuestion.IsComplete()) { r.AddQuestion(currSubj, currQuestion) }
-      currQuestion = new classes.Question()
+      currQuestion = new Question()
       currSubj = currData
       ExpectedIdentifier = ['?']
       continue
@@ -184,7 +588,7 @@ function ReadData (data) {
     if (currIdentifier === '?') {
       if (currQuestion.IsComplete()) {
         r.AddQuestion(currSubj, currQuestion)
-        currQuestion = new classes.Question()
+        currQuestion = new Question()
       }
       // overwriting is allowed here, bcus:
       // ?????!>
diff --git a/utils/question-classes b/utils/question-classes
index 0cfd9cf..5dac788 160000
--- a/utils/question-classes
+++ b/utils/question-classes
@@ -1 +1 @@
-Subproject commit 0cfd9cfda377ff8917df50e68f105ec43f5e9311
+Subproject commit 5dac788b18b7240a4194a2a37ecbee857292800d