A E H K M c1
B E I L M c1
A G I L N c1
B G H K M c1
A G I L M c1
B F I L M c2
B F J L N c2
B E I L N c2
C G J K N c2
C G J L M c2
D G J K M c2
B D I L M c2
D E H K N c3
A E H K N c3
D E H L N c3
D F J L N c3
A F H K N c3
D E J L M c3
C F J L M c3
D F H L M c3