-- adder8.oracle
-- Krivacic July 27, 1987 4:59:18 pm PDT

0 0  1 1 | 1
1 0  1 0 | 1
0 1  1 0 | 1
1 0  1 1 | 2
1 1  1 0 | 2
1 1  0 1 | 0
0 1  0 1 | 1
0 1  0 0 | 0
1 1  1 1 | 3