from itertools import product

def get_coords():
    coords = input()
    coords_tup = tuple(map(int, coords.split()))
    
    return coords_tup
    
def cartesian_product():
    coords_a = get_coords()
    coords_b = get_coords()
    
    return list(product(coords_a, coords_b))
    
cp = cartesian_product()    
print(*cp)