S = S.strip()
try:
    if S[0] == "-" or S[0] == "_" or S[-1] == "-" or S[-1] == "_":
        raise ValueError
    if len(S) > 32:
        raise ValueError
    for c in S:
        code = ord(c)
        if not ((code == 45) or (code >=48 and code <=57) or code == 95 or (code >=65 and code <=90) or (code >=97 and code <=122)):
            raise ValueError
except Exception as e:
    print(400)
else:
    print(200)