a: int = 5
b: int = 10
result: int = 0


def sum_numbers() -> None:
    global result
    result = result + a + b
    print(result)


sum_numbers()


def sum_numbers_correct(a: int, b: int) -> int:
    result: int = a + b
    return result


x_result: int = sum_numbers_correct(a=10, b=15)
y_result: int = sum_numbers_correct(a=25, b=30)

print(x_result, y_result)