diff --git a/main.user.js b/main.user.js
index 2fc0123..a587b13 100644
--- a/main.user.js
+++ b/main.user.js
@@ -9,4 +9,164 @@
 // @grant       GM_log
 // @version     0.0.1
 // @author      Dominik Säume
-// ==/UserScript==
\ No newline at end of file
+// ==/UserScript==
+
+const URL_STORAGE_KEY = "itexamanswers.net URL";
+let awnserData;
+
+console.log = console.__proto__.log;
+
+window.addEventListener("keydown", event => {
+  switch(event.key){
+    case "p":
+        const oldAwnsersURL = GM_getValue(URL_STORAGE_KEY);
+        let newAwnsersURL = prompt("Please input the answer url (itexamanswers.net)", oldAwnsersURL);
+        GM_setValue(URL_STORAGE_KEY, newAwnsersURL);
+        fetchData(newAwnsersURL);
+        break;
+
+    case "n":
+        document.getElementById("next").click();
+        break;
+
+    case "a":
+        awnserQuestion();
+        break;
+  }
+})
+
+function awnserQuestion(){
+    const question = document.querySelector(".question:not(.hidden)");
+    if (!question) {
+        return;
+    }
+
+    const questionTextDom = question.querySelector(".questionText .mattext");
+    if (!questionTextDom) return;
+    const questionText = questionTextDom.textContent.trim();
+
+    const answersDom = question.querySelector("ul.coreContent");
+    if (!answersDom) return;
+    const answers = answersDom.children;
+
+    for (let answer of answers) {
+        const input = answer.querySelector("input");
+        if (!input) continue;
+        input.checked = false;
+    }
+
+    const correctAnswers = findAnswers(questionText, answers);
+    if (correctAnswers.length === 0) {
+        GM_log("no awnser")
+        return;
+    }
+
+    for (const answer of correctAnswers) {
+        const input = answer.querySelector("input");
+        if (!input) continue;
+        input.checked = true;
+    }
+}
+
+function findAnswers(questionText, answers) {
+    if (awnserData === null) {
+        alert("No chapter data loaded. Maybe the fetch failed?!");
+        return [];
+    }
+
+    const correctAnswers = [];
+    for (let entry of awnserData) {
+        if (matchAwnser(questionText.trim(), entry.question.trim())) {
+            for (let availableAnswer of answers) {
+                for (let possibleAnswer of entry.answers) {
+                    if (matchAwnser(availableAnswer.textContent.trim(), possibleAnswer)) {
+                        correctAnswers.push(availableAnswer);
+                    }
+                }
+            }
+        }
+    }
+
+    return correctAnswers;
+}
+
+function matchAwnser(textA, textB) {
+    const replaceRegex = /[^\w]/gi;
+    textA = textA.replace(replaceRegex, "");
+    textB = textB.replace(replaceRegex, "");
+    return (textA === textB);
+}
+
+function fetchData(awnserURL = ""){
+    GM_xmlhttpRequest({
+      method: "GET",
+      url: awnserURL,
+      headers: {
+        "Content-Type": "text/html"
+      },
+      onload: function(response) {
+        awnserImgs = new Map();
+        const results = [];
+        const parser = new DOMParser();
+        const virtDom = parser.parseFromString(response.responseText, "text/html");
+
+        let answersDom = virtDom.querySelector(".pf-content");
+        if (!answersDom) {
+          answersDom = virtDom.querySelector(".thecontent");
+        }
+
+        let index = -1;
+        for (let childDom of answersDom.children) {
+            index++;
+
+            if (childDom.tagName === "P" || childDom.tagName === "STRONG" ) {
+
+                // maybe a question question
+                let innerDom = childDom.querySelector("strong");
+                if (innerDom === null) {
+                  if(!childDom.textContent){
+                    continue;
+                  }
+                  innerDom = childDom;
+                };
+
+                const textContent = innerDom.textContent.trim();
+                const matches = textContent.match(/^[0-9]+\. (.*)$/);
+                if (matches !== null) {
+                    const questionText = matches[1];
+
+                    // most likely a question
+                    let nextChild = answersDom.children[index + 1];
+
+                    if (nextChild.tagName === "P"){
+                      nextChild = answersDom.children[index + 2];
+                    };
+
+                    if (nextChild === null) continue;
+
+                    if (nextChild.tagName === "UL") {
+                        // most likely the awnser
+                        const answers = [];
+                        for (let answerDom of nextChild.querySelectorAll("strong")) {
+                            let answerText = answerDom.textContent.trim();
+                            if (answerText.endsWith("*")) {
+                                answerText = answerText.substring(0, answerText.length - 1);
+                            }
+                            answers.push(answerText);
+                        }
+
+                        results.push({
+                            question: questionText,
+                            answers: answers
+                        });
+                    }
+                }
+
+            }
+        }
+        awnserData = results;
+        GM_log(results);
+        GM_log(awnserImgs);
+      }
+    });
+}
\ No newline at end of file