diff --git a/src/Codewars/is_pangram.py b/src/Codewars/is_pangram.py
deleted file mode 100644
index 843e0c7..0000000
--- a/src/Codewars/is_pangram.py
+++ /dev/null
@@ -1,9 +0,0 @@
-def is_pangram(st):
-    letters_used = []
-    alphabet = set("abcdefghijklmnopqrstuvwxyz")
-    for letter in st.lower():
-        if letter in alphabet:
-            letters_used.append(letter)
-    if set(letters_used) == alphabet:
-        return True
-    return False
diff --git a/src/Codewars/vigenere_cipher_helper.py b/src/Codewars/vigenere_cipher_helper.py
deleted file mode 100644
index b560a7f..0000000
--- a/src/Codewars/vigenere_cipher_helper.py
+++ /dev/null
@@ -1,56 +0,0 @@
-class VigenereCipher(object):
-    def __init__(self, key, alphabet):
-        self.key = key
-        self.alphabet = alphabet
-
-    def encode(self, text):
-        len_text = len(text)
-        len_key = len(self.key)
-
-        if len_key < len_text:
-            new_key = (
-                self.key * (len_text // len_key) + self.key[: (len_text % len_key)]
-            )
-        else:
-            new_key = self.key[:len_text]
-
-        new_text = []
-
-        for l_text, l_key in zip(text, new_key):
-            if l_text in self.alphabet:
-                if l_key in self.alphabet:
-                    new_pos = (
-                        self.alphabet.index(l_text) + self.alphabet.index(l_key)
-                    ) % len(self.alphabet)
-                else:
-                    new_pos = self.alphabet.index(l_text)
-                new_text.append(self.alphabet[new_pos])
-            else:
-                new_text.append(l_text)
-        return "".join(new_text)
-
-    def decode(self, text):
-        len_text = len(text)
-        len_key = len(self.key)
-
-        if len_key < len_text:
-            new_key = (
-                self.key * (len_text // len_key) + self.key[: (len_text % len_key)]
-            )
-        else:
-            new_key = self.key[:len_text]
-
-        new_text = []
-
-        for l_text, l_key in zip(text, new_key):
-            if l_text in self.alphabet:
-                if l_key in self.alphabet:
-                    new_pos = (
-                        self.alphabet.index(l_text) - self.alphabet.index(l_key)
-                    ) % len(self.alphabet)
-                else:
-                    new_pos = self.alphabet.index(l_text)
-                new_text.append(self.alphabet[new_pos])
-            else:
-                new_text.append(l_text)
-        return "".join(new_text)