print('hello world')
print(input('ведите текст:'))

def ab():
    a = int(input())
    b = int(input())
    print(a + b)

def a_mul_b():
    a = int(input())
    b = int(input())
    print(a * b)

def a_div_b():
    a = int(input())
    b = int(input())
    while b == 0:
        print('нельзя делить на'0' )
ab()