diff --git a/BINF2025_TP4.ipynb b/BINF2025_TP4.ipynb
index be4f132..d058775 100644
--- a/BINF2025_TP4.ipynb
+++ b/BINF2025_TP4.ipynb
@@ -3,9 +3,7 @@
   "nbformat_minor": 0,
   "metadata": {
     "colab": {
-      "provenance": [],
-      "authorship_tag": "ABX9TyOkaYHMV5kAI2JXjqDKbiVa",
-      "include_colab_link": true
+      "provenance": []
     },
     "kernelspec": {
       "name": "python3",
@@ -19,8 +17,7 @@
     {
       "cell_type": "markdown",
       "metadata": {
-        "id": "view-in-github",
-        "colab_type": "text"
+        "id": "view-in-github"
       },
       "source": [
         "<a href=\"https://colab.research.google.com/github/pparutto/BINF2025_TP4/blob/main/BINF2025_TP4.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
@@ -184,7 +181,17 @@
     {
       "cell_type": "code",
       "source": [
-        "#Votre code ici"
+        "def mark_columns(A: list, alpha: float) -> list :\n",
+        "  n = len(A[0])\n",
+        "  colomns_mark = []\n",
+        "  for i in range(n):\n",
+        "    cpt_trou = 0\n",
+        "    for j in range(len(A)):\n",
+        "      if A[j][i] == '-':\n",
+        "        cpt_trou += 1\n",
+        "    if cpt_trou < alpha:\n",
+        "      colomns_mark.append(i)\n",
+        "  return colomns_mark"
       ],
       "metadata": {
         "id": "ikf5pcUtRYvV"
@@ -192,6 +199,32 @@
       "execution_count": null,
       "outputs": []
     },
+    {
+      "cell_type": "code",
+      "source": [
+        "A = ['AT-G', 'AATC', 'ACAG']\n",
+        "alpha = 1\n",
+        "\n",
+        "print(mark_columns(A, alpha))"
+      ],
+      "metadata": {
+        "colab": {
+          "base_uri": "https://localhost:8080/"
+        },
+        "id": "8YO0PjTgH5dV",
+        "outputId": "903e5627-fca4-4743-fe05-375c59d8ef6e"
+      },
+      "execution_count": null,
+      "outputs": [
+        {
+          "output_type": "stream",
+          "name": "stdout",
+          "text": [
+            "[0, 1, 3]\n"
+          ]
+        }
+      ]
+    },
     {
       "cell_type": "markdown",
       "source": [
@@ -230,6 +263,34 @@
       "execution_count": null,
       "outputs": []
     },
+    {
+      "cell_type": "code",
+      "source": [
+        "def createT(A: list, alpha: float):\n",
+        "  N = mark_columns(A, alpha)\n",
+        "  T = [[1 for _ in range((N + 1) * 9)] for _ in range((N + 1) * 9)]\n",
+        "  for i in range((N + 1) * 9):\n",
+        "    T[i][0] = 0\n",
+        "    if i % 3 == 0:\n",
+        "      T[i][((N + 1) * 9) - 1] = 0\n",
+        "  return T\n",
+        "\n",
+        "def createeM(A: list, alpha: float):\n",
+        "  N = mark_columns(A, alpha)\n",
+        "  eM = [[1 for _ in range((N + 1) * 20)] for _ in range((N + 1) * 20)]\n",
+        "  for i in range((N + 1) * 9):\n",
+        "    eM[0][i] = 0\n",
+        "\n",
+        "def createeI(A: list, alpha: float):\n",
+        "  N = mark_columns(A, alpha)\n",
+        "  eI = [[1 for _ in range((N + 1) * 20)] for _ in range((N + 1) * 20)]"
+      ],
+      "metadata": {
+        "id": "NVcQQChMMpl-"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
     {
       "cell_type": "markdown",
       "source": [
@@ -344,4 +405,4 @@
       "outputs": []
     }
   ]
-}
\ No newline at end of file
+}