00 01 11 10
00 0 0 0 4 0 12 0 8
01 0 1 0 5 0 13 0 9
11 0 3 0 7 0 15 0 11
10 0 2 0 6 0 14 0 10

E=0


 00 01 11 10
00 0 16 0 20 0 28 0 24
01 0 17 0 21 0 29 0 25
11 0 19 0 23 0 31 0 27
10 0 18 0 22 0 30 0 26

E=1