try:
    if S[0] == "-" or S[0] == "_" or S[-1] == "-" or S[-1] == "_":
        raise ValueError("_ -が末尾にあります")
    for i in range(len(S)):
        target = S[i]
        code = ord(target)
        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("A~Z a~z 0~9 _ -以外の文字列を含んでいます")
except Exception as e:
    print(400)
else:
    print(200)