added secret_language file

Author: vivek2004-sec

strings/secret_language.py

@@ -5,15 +5,20 @@
 
 
 def random_chars() -> str:
-    """
+    '''
     Generate a random string of 3 ASCII letters.
 
     >>> import random
     >>> len(random_chars()) == 3
     True
+    
+    
     >>> all(c in string.ascii_letters for c in random_chars())
     True
-    """
+    
+    
+    
+    '''
     return ''.join(random.choices(string.ascii_letters, k=3))
 
 
@@ -23,6 +28,9 @@ def random_digits() -> str:
 
     >>> len(random_digits()) == 3
     True
+    
+    
+    
     >>> all(c in string.digits for c in random_digits())
     True
     """
@@ -40,6 +48,8 @@ def encode(code: str) -> str:
     True
     >>> len(encode('hi')) == len('hi') + 12
     True
+    
+    
     """
     if len(code) >= 3:
         code = code[1:] + code[0]
@@ -61,6 +71,9 @@ def decode(code: str) -> str:
     'hi'
     >>> decode(encode('python'))
     'python'
+    
+    
+    
     """
     code = code[6:-6]
     if len(code) >= 3: