diff --git a/solution.js b/solution.js
index 000a092..d116bf9 100644
--- a/solution.js
+++ b/solution.js
@@ -1,5 +1,165 @@
 const { nums, words } = require("./data/data.js");
 
+class Node {
+  constructor(data) {
+    this.data = data;
+    this.next = null;
+  }
+}
+
+class LinkedList {
+  constructor() {
+    this.head = null;
+  }
+  // 1. Create a method called `insert` that takes in a `data` argument and creates a new `Node` with the data and adds it to the front of the list.
+  insert(data) {
+    let newNode = new Node(data);
+    newNode.next = this.head;
+    this.head = newNode;
+  }
+
+  size() {
+    let count = 0;
+    let currentNode = this.head;
+    while (currentNode) {
+      count++;
+      currentNode = currentNode.next;
+    }
+    return count;
+  }
+
+  getFirst() {
+    return this.head;
+  }
+
+  getLast() {
+    let currentNode = this.head;
+    while (currentNode) {
+      if (currentNode.next === null) {
+        return currentNode;
+      }
+      currentNode = currentNode.next;
+    }
+  }
+
+  search(data) {
+    let currentNode = this.head;
+    while (currentNode) {
+      if (currentNode.data === data) {
+        return currentNode;
+      }
+      currentNode = currentNode.next;
+    }
+    return null;
+  }
+
+  // getkth(k) {
+  //   let currentNode = this.head;
+  //   let count = 1;
+  //   while(currentNode) {
+  //     if(count === k) {
+  //       return currentNode;
+  //     }
+  //     currentNode = currentNode.next;
+  //     count++;
+  //   }
+  //   return null;
+  // }
+
+  getKth(k) {
+    let currentNode = this.head;
+    let count = 1;
+    while (currentNode) {
+      if (count === k) {
+        return currentNode;
+      }
+      currentNode = currentNode.next;
+      count++;
+    }
+    return null;
+  }
+
+  getKthToLast(k) {
+    let currentNode = this.head;
+    let count = 1;
+    while (currentNode) {
+      if (count === this.size() - k) {
+        return currentNode;
+      }
+      currentNode = currentNode.next;
+      count++;
+    }
+    return null;
+  }
+
+  isEmpty() {
+    if (this.head === null) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  clear() {
+    this.head = null; //clear the head and tail and set the length to 0 to clear the list
+  }
+
+  toArray() {
+    let currentNode = this.head;
+    let array = [];
+    while (currentNode) {
+      array.push(currentNode.data);
+      currentNode = currentNode.next;
+    }
+    return array;
+  }
+
+  // delete(position) {
+  //   let currentNode = this.head;
+  //   let count = 1;
+  //   while (currentNode) {
+  //     if (count + 1 === position) {
+  //       let temp = currentNode.next.next;
+  //       currentNode.next = temp;
+  //       return this.head;
+  //     }
+  //     currentNode = currentNode.next;
+  //     count++;
+  //   }
+  //   return currentNode
+  // }
+
+  delete(data) {
+    let currentNode = this.head;
+    let previousNode = null;
+    while (currentNode) {
+      if (currentNode.data === data) {
+        if (previousNode) {
+          previousNode.next = currentNode.next;
+        } else {
+          this.head = currentNode.next;
+        }
+        return;
+      }
+      previousNode = currentNode;
+      currentNode = currentNode.next;
+    }
+  }
+
+  containsDuplicates() {
+    let currentNode = this.head;
+    let array = [];
+    while (currentNode) {
+      if (array.includes(currentNode.data)) {
+        return true;
+      }
+      array.push(currentNode.data);
+      currentNode = currentNode.next;
+    }
+    return false;
+  }
+}
+
 module.exports = {
   Node,
   LinkedList,