diff --git a/merger.js b/merger.js
index 0e3c6fe..a02b3b4 100644
--- a/merger.js
+++ b/merger.js
@@ -28,16 +28,15 @@ function Main() {
 	console.log(params);
 	var oldData = "";
 	var sum = 0;
-	for (var i = 0; i < params.length; i++) {
-		const data = utils.ReadFile(params[i]);
-		var r = actions.NLoad(data);
-		if (r.count > 0) {
-			sum += r.count;
-			console.log(params[i] + ": " + r.count);
 
-			oldData += "\n" + data;
-		} else
-			console.log("error loading: " + params[i]);
+	var r = ReadData(utils.ReadFile(params[0]));
+	console.log(r.result.toString());
+	console.log("\n\n");
+	console.log("errors:");
+	console.log(r.logs.join("\n"));
+
+	/*for (var i = 0; i < params.length; i++) {
+		const data = utils.ReadFile(params[i]);
 	}
 	console.log("-------------");
 	console.log("Sum: " + sum);
@@ -46,7 +45,7 @@ function Main() {
 	var nr = actions.NLoad(newData);
 	console.log("New result: " + nr.count);
 	utils.WriteFile(newData, "newData");
-	console.log("File written!");
+	console.log("File written!");*/
 }
 
 function GetParams() {
@@ -59,19 +58,31 @@ function GetParams() {
  * i: image
  * */
 function Question(q, a, i) {
-	this.q = q;
-	this.a = a;
-	this.i = i;
+	this.Q = q;
+	this.A = a;
+	this.I = i;
 	this.toString = function() {
-		var r = "?" + this.q + "\n!" + a;
-		if (i)
-			r += "\n>" + i;
+		var r = "?" + this.Q + "\n!" + this.A;
+		if (this.I)
+			r += "\n>" + this.I;
 		return r;
 	};
+	this.HasQuestion = function() {
+		return this.Q != undefined;
+	};
+	this.HasAnswer = function() {
+		return this.A != undefined;
+	};
+	this.HasImage = function() {
+		return this.I != undefined;
+	};
+	this.IsComplete = function() {
+		return this.HasQuestion() && this.HasAnswer();
+	};
 	this.Compare = function(q2) {
-		const qmatchpercent = CompareString(this.q, q2.q);
-		const amatchpercent = CompareString(this.a, q2.a);
-		const imatchpercent = i ? CompareString(this.i, q2.i) : 0;
+		const qmatchpercent = CompareString(this.Q, q2.Q);
+		const amatchpercent = CompareString(this.A, q2.A);
+		const imatchpercent = I ? CompareString(this.I, q2.I) : 0;
 
 		return (qmatchpercent + amatchpercent + imatchpercent) / 3;
 	};
@@ -99,43 +110,120 @@ function Subject(n) {
 	this.AddQuestion = function(q) {
 		this.Questions.push(q);
 	};
+	this.toString = function() {
+		var r = [];
+		for (var i = 0; i < this.Questions.length; i++)
+			r.push(this.Questions[i].toString());
+		return "+" + this.Name + "\n" + r.join("\n");
+	};
 }
 
-function QuestionDB () {
+function QuestionDB() {
 	this.Subjects = [];
 	this.AddQuestion = function(subj, q) {
-
-		
+		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);
+		}
+	};
+	this.toString = function() {
+		var r = [];
+		for (var i = 0; i < this.Subjects.length; i++)
+			r.push(this.Subjects[i].toString());
+		return r.join("\n\n");
 	};
 }
 
 /*
-	* Returns a question database from the given data.
-	* Parameter should be raw read file in string
-	* */
+ * Returns a question database from the given data.
+ * Parameter should be raw read file in string with "\n"-s
+ * TODO: ??? -s are not listed as errors, tho works correctly
+ * */
 function ReadData(data) {
 
-	function AddQuestion(q) {
+	const d = data.split("\n");
+	const r = new QuestionDB();
+	var logs = [];
+	var currSubj = ""; // the current subjects name
+	var ExpectedIdentifier = ['+', '?'];
+	let currQuestion = new Question();
 
+	var i = -1;
+	while (i < d.length) {
+		let currIdentifier;
+		let skipped = 0;
+		do {
+			if (skipped >= 1)
+				logs.push(i + ": " + d[i]);
+			i++;
+			if (i >= d.length)
+				return {
+					result: r,
+					logs: logs
+				};
+			currIdentifier = d[i][0];
+			skipped++;
+		} while (!ExpectedIdentifier.includes(currIdentifier) && i < d.length);
+
+		let currData = d[i].substring(1);
+
+		if (currIdentifier == '+') {
+			currSubj = currData;
+			ExpectedIdentifier = ['?'];
+			continue;
+		}
+
+		if (currIdentifier == '?') {
+			if (currQuestion.IsComplete()) {
+				r.AddQuestion(currSubj, currQuestion);
+				currQuestion = new Question();
+			}
+			// overwriting is allowed here, bcus:
+			// ?????!>
+			currQuestion.Q = currData;
+			ExpectedIdentifier = ['!', '?'];
+			continue;
+		}
+
+		if (currIdentifier == '!') {
+			// if dont have question continue
+			if (!currQuestion.HasQuestion())
+				throw "No question! (A)";
+			// dont allow overwriting
+			// ?!!!! 
+			if (!currQuestion.HasAnswer()) {
+				currQuestion.A = currData;
+			}
+			ExpectedIdentifier = ['?', '>', '+'];
+			continue;
+		}
+
+		if (currIdentifier == '>') {
+			// if dont have question or answer continue
+			if (!currQuestion.HasQuestion())
+				throw "No question! (I)";
+			if (!currQuestion.HasAnswer())
+				throw "No asnwer! (I)";
+			// dont allow overwriting
+			// ?!>>>
+			if (!currQuestion.HasImage()) {
+				currQuestion.I = currData;
+			}
+			ExpectedIdentifier = ['?', '+'];
+			continue;
+		}
 	}
-	var d = data.split("\n");
-	var result =
-
-
-	/*
-	 * sliding window
-	 * check if its a ?
-	 * then searches next !
-	 * then checks if next is ? or >
-	 * adds to different subj on +
-	 *
-	 * ERROR HANDLING:
-	 * skips unexpected start characters
-	 * resets curr question if there are multiple ?-s after each other
-	 * 
-	 * DOES NOT COMPARES
-	 * */
 
+	return {
+		result: r,
+		logs: logs
+	};
 }
 
 function SortQuestions(dataObj) {
@@ -145,17 +233,12 @@ function SortQuestions(dataObj) {
 }
 
 function RemoveDuplicates(dataObj) {
+	// TODO: compare and delete
 	/*
 	 * removes duplicates from a read data by comparing every question after sorting
 	 * */
 }
 
-function QuestionDbToString(questionObj) {
-	/*
-	 * Converst a question db object to string for writing out
-	 * */
-}
-
 function SimplifyStringForComparison(value) {
 	value = RemoveUnnecesarySpaces(value).toLowerCase();
 	var removableChars = [",", ".", ":", "!"];