def is_prime(n):
    if n <= 2: return True
    for i in range(2, int(n**0.5)+1):
        if n % i == 0:
            return False
    return True
def ttn(s):
    if 'a' <= s <= 'z':
        return ord(s) - 96
    elif 'A' <= s <= 'Z':
        return ord(s) - 38
    else:
        return 0

while True:
    try:
        a = sum(ttn(i) for i in input())
        print(f'It is {"" if is_prime(a) else "not "}a prime word.')
    except: break