Extensions of 'sun' (2) X47900
Write a function is_sun_extension(s) that given an string s, returns True if it is possible to form the word sun by erasing zero or more letters in s and False otherwise. Do not use the index() string method to solve this problem.
Sample session
>>> is_sun_extension('sun') True >>> is_sun_extension('assumption') True >>> is_sun_extension('assume') False >>> is_sun_extension('russian') False >>> is_sun_extension('scouting') True >>> is_sun_extension('innocuous') False
Information
- Author
- ProAl
- Language
- English
- Official solutions
- Python
- User solutions
- Python