2ex

def f(x,y,z,w):
    return((x <= y) or (not (z <= w))) and ((w <= (not x)) or ((not y) <= z))
for x in range(2):
    for y in range(2):
        for z in range(2):
            for w in range(2):
                if f(x,y,z,w) == False:
                    print(x,y,z,w)