sum prime nonprime

number = int(input())
prime_numbers_sum = 0
nonprime_numbers_sum = 0

while number != "stop":
    number = int(number)
    if number < 0:
        print("Number is negative.")
        continue

    elif number > 1:
        for k in range(2, number):
            if number % k == 0:
                nonprime_numbers_sum += number
                break
        else:
            prime_numbers_sum += number

    number = input()
print(f"Sum of all prime numbers is: {prime_numbers_sum}")
print(f"Sum of all non prime numbers is: {nonprime_numbers_sum}")