[jasonmoo]

This is great! Here's a demo of the full set to illustrate your point more fully.

http://play.golang.org/p/T1eJ4prBHM

[username3]

Missing 9 and 6.

mirror pairs

(1) 0001/1000 (8)

(2) 0010/0100 (4)

(3) 0011/1100 (C)

(5) 0101/1010 (A)

(7) 0111/1110 (E)

(B) 1011/1101 (D)

(0) 0000/1111 (F)

Program exited.