从A到B的映射共有8个:
A..a,..b..c
f1.0...0...0
f2.1...1...1
f3.0...0...1
f4.0...1...0
f5.1...0...0
f6.0...1...1
f7.1....0...1
f8.1....1...0
从A到B的映射共有8个:
A..a,..b..c
f1.0...0...0
f2.1...1...1
f3.0...0...1
f4.0...1...0
f5.1...0...0
f6.0...1...1
f7.1....0...1
f8.1....1...0