diff --git a/implement-cowsay/main.py b/implement-cowsay/main.py
new file mode 100644
index 00000000..31454da4
--- /dev/null
+++ b/implement-cowsay/main.py
@@ -0,0 +1,11 @@
+import cowsay
+import argparse
+
+parser = argparse.ArgumentParser(prog="cowsay", description="displays cowsay charactor with given arguments")
+parser.add_argument('--animal', choices=cowsay.char_names, default="cow", help= 'please enter a valid animal')
+parser.add_argument('message', nargs="+", help= 'please enter a message')
+arg = parser.parse_args()
+
+msg = " ".join(arg.message)
+animal_func = getattr(cowsay, arg.animal)
+print(animal_func(msg))
diff --git a/implement-cowsay/requirements.txt b/implement-cowsay/requirements.txt
new file mode 100644
index 00000000..c6b9ffd0
--- /dev/null
+++ b/implement-cowsay/requirements.txt
@@ -0,0 +1 @@
+cowsay
diff --git a/individual-shell-tools/ls/script-01.sh b/individual-shell-tools/ls/script-01.sh
deleted file mode 100755
index 241b62f5..00000000
--- a/individual-shell-tools/ls/script-01.sh
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail
-
-# Do not change this part of the script - only change after the TODO comment.
-
-script_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)"
-if [[ "${script_dir}" != "$(pwd)" ]]; then
-  echo >&2 "ERROR: You haven't cd'd into the correct directory."
-  echo >&2 "For each exercise, you should cd to the directory containing the script before running it."
-  exit 1
-fi
-
-# TODO: Write a command to list the files and folders in this directory.
-# The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more.
diff --git a/individual-shell-tools/ls/script-02.sh b/individual-shell-tools/ls/script-02.sh
deleted file mode 100755
index d0a5a10f..00000000
--- a/individual-shell-tools/ls/script-02.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail
-
-# TODO: Write a command which lists all of the files in the directory named child-directory.
-# The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt.