diff --git a/uebungen.ipynb b/uebungen.ipynb
index d2f558d..2229c00 100644
--- a/uebungen.ipynb
+++ b/uebungen.ipynb
@@ -1920,6 +1920,16 @@
    "source": [
     "# Fügen Sie hier Ihren Code ein.\n",
     "\n",
+    "buffer_size = 32\n",
+    "\n",
+    "with open('ohm.png', 'rb') as file:\n",
+    "    with open('logo.png', 'wb') as file:\n",
+    "        buffer = file.read(buffer_size)\n",
+    "        \n",
+    "        while len(buffer) > 0:\n",
+    "            file.write(buffer)\n",
+    "            buffer = file.read(buffer_size)\n",
+    "\n",
     "Image(filename=\"logo.png\")"
    ]
   },
@@ -1961,23 +1971,42 @@
    "source": [
     "def input_lines(prompt_text):\n",
     "    # Fügen Sie hier Ihren Code ein.\n",
-    "    pass\n",
+    "    lines = []\n",
+    "    last_input = input(prompt_text)\n",
+    "\n",
+    "    while len(last_input) > 0:\n",
+    "        lines.append(last_input)\n",
+    "        last_input = input(prompt_text)\n",
+    "\n",
+    "    return lines\n",
     "\n",
     "def write_lines_to_file(lines, filename):\n",
     "    # Fügen Sie hier Ihren Code ein.\n",
-    "    pass\n",
+    "    with open(filename, 'w') as outfile:\n",
+    "        for line in lines:\n",
+    "            outfile.write(line + '\\n')\n",
     "\n",
     "def copy_textfile_reversed(text_filename, cpy_filename):\n",
     "    # Fügen Sie hier Ihren Code ein.\n",
-    "    pass\n",
+    "    with open(text_filename, 'r') as file:\n",
+    "        lines = file.readlines()\n",
+    "    \n",
+    "    with open(cpy_filename, 'w') as file:\n",
+    "        for line in lines[::-1]:\n",
+    "            file.write(line.strip()[::-1] + '\\n')\n",
     "\n",
     "def output_files_together(filename1, filename2):\n",
     "    # Fügen Sie hier Ihren Code ein.\n",
-    "    pass\n",
+    "    with open(filename1, 'r') as file1:\n",
+    "        with open(filename2, 'r') as file2:\n",
+    "            for line1, line2 in zip(file1, file2):\n",
+    "                print(line1.strip())\n",
+    "                print(line2.strip())\n",
+    "\n",
     "\n",
     "lines = input_lines('Geben Sie einen Text ein: ')\n",
     "write_lines_to_file(lines, 'eingaben.txt')\n",
-    "copy_textfile_reversed('eingabe.txt', 'umgekehrte_eingaben.txt')\n",
+    "copy_textfile_reversed('eingaben.txt', 'umgekehrte_eingaben.txt')\n",
     "output_files_together('eingaben.txt', 'umgekehrte_eingaben.txt')"
    ]
   },