def pangrams(string):
    alphabet = list('abcdefghijklmnopqrstuvwxyz')
    if len(string) < len(alphabet):
        return 'not pangram'
    for s in string:
        s = s.lower()
        if s in alphabet:
            index = alphabet.index(s)
            alphabet.pop(index)
        if not alphabet:
            return 'pangram'
    return 'not pangram'