from itertools import product

space_separted_element_a = list(map(int,input().split())) space_separted_element_b = list(map(int,input().split()))

print(*product(space_separted_element_a,space_separted_element_b))

Product is like a For loop

Pairs = []

for x in [1,2]:

for y in [3,4]:

pairs.append((x,y))

print(Pairs)