alphabet = "abcdefghijklmnopqrstuvwxyz"
test_dups = ["zzz", "dog", "bookkeeper", "subdermatoglyphic", "subdermatoglyphics"]
test_miss = ["zzz", "subdermatoglyphic", "the quick brown fox jumps over the lazy dog"]


def histogram(s):
    d = dict()
    for c in s:
        if c not in d:
            d[c] = 1
        else:
            d[c] += 1
    return d


def has_duplicates(s):
    h = histogram(s)
    for k,v in h.items():
        if v > 1:
            return True
    return False
for s in test_dups:
    if has_duplicates(s):
        print(s, "has duplicates")
    else:
        print(s, "uses all the letters")