added new file of secret_language

Author: vivek2004-sec

strings/Secret_language.py

@@ -0,0 +1,53 @@
+# Encoding & Decoding
+
+import random
+import string
+
+def random_chars() -> str:
+    '''
+    Adds random 3 charaters to the string.
+    
+    '''
+    return ''.join(random.choices(string.ascii_letters, k=3))
+
+def random_digits() -> str:
+    '''
+    Adds 3 random digits to the string.
+    '''
+    
+    return ''.join(random.choices(string.digits, k=3))
+
+def encode(code) -> str:
+    '''
+    Encodes the code by shifting the first character to the end of the original string,
+    and adding the 3 random_characters + 3 random-digits + original string(code) +  3 random-digits + 3 random_characters.
+    unless the length of the code exceeds 3 or equals to it.'''
+    
+    if len(code) >= 3:
+        code = code[1:] + code[0]
+        code = random_chars() + random_digits() + code + random_digits() + random_chars()
+    else:
+        code = code[::-1]
+        code = random_chars() + random_digits() + code + random_digits() + random_chars()
+    return code
+
+def decode(code) -> str:
+    '''
+    decodes the encoded string by removing the randomly added characters and reversing the shift
+    
+    '''
+    
+    code = code[6:-6]
+    if len(code) >= 3:
+        code = code[-1] + code[:-1]
+    else:
+        code = code[::-1]
+    return code
+
+if __name__ == "__main__":
+    code = input("Enter the code: ")
+    encoded = encode(code)
+    decoded = decode(encoded)  
+    print(f"Original → {code}")
+    print(f"Encoded  → {encoded}")
+    print(f"Decoded  → {decoded}")