- def add_is_prefix(input_string): 
-     # Check if the string already starts with "Is" 
-     if input_string.startswith("Is"): 
-         return input_string 
-     else: 
-         # Add "Is" to the front of the string 
-         return "Is" + input_string 
-   
- # Example usage: 
- print(add_is_prefix("Island"))  # Output: Island 
- print(add_is_prefix("land"))    # Output: Island 
				ZGVmIGFkZF9pc19wcmVmaXgoaW5wdXRfc3RyaW5nKToKICAgICMgQ2hlY2sgaWYgdGhlIHN0cmluZyBhbHJlYWR5IHN0YXJ0cyB3aXRoICJJcyIKICAgIGlmIGlucHV0X3N0cmluZy5zdGFydHN3aXRoKCJJcyIpOgogICAgICAgIHJldHVybiBpbnB1dF9zdHJpbmcKICAgIGVsc2U6CiAgICAgICAgIyBBZGQgIklzIiB0byB0aGUgZnJvbnQgb2YgdGhlIHN0cmluZwogICAgICAgIHJldHVybiAiSXMiICsgaW5wdXRfc3RyaW5nCgojIEV4YW1wbGUgdXNhZ2U6CnByaW50KGFkZF9pc19wcmVmaXgoIklzbGFuZCIpKSAgIyBPdXRwdXQ6IElzbGFuZApwcmludChhZGRfaXNfcHJlZml4KCJsYW5kIikpICAgICMgT3V0cHV0OiBJc2xhbmQ=