tr10.n2

def f(x, y, z, w):
    return (x >= z) and w and (y != z)

v = [0,1]
print('x y z w')
for x in v:
    for y in v:
        for z in v:
            for w in v:
                F = f(x,y,z,w)
                if F:
                    print(x,y,z,w)