'''
Your task is very simple. Just write a function isAlphabetic(s), which takes an input string s in lowercase and returns true/false depending on whether the 
string is in alphabetical order or not.
For example, isAlphabetic('kata') is False as 'a' comes after 'k', but isAlphabetic('ant') is True.

Good luck :)
'''

def alphabetic(s):
    if s == "".join(sorted(s)): return True
    return False    