A | B | A = A^B | B = A^B | A = A^B | A | B 
===|===|=========|=========|=========|===|===
 0 | 0 | 0 = 0^0 | 0 = 0^0 | 0 = 0^0 | 0 | 0
---+---+---------+---------+---------+---+---
 0 | 1 | 1 = 0^1 | 0 = 1^1 | 1 = 1^0 | 1 | 0
---+---+---------+---------+---------+---+---
 1 | 0 | 1 = 1^0 | 1 = 1^0 | 0 = 1^1 | 0 | 1
---+---+---------+---------+---------+---+---
 1 | 1 | 0 = 1^1 | 1 = 0^1 | 1 = 0^1 | 1 | 1