|
C D |
|||||
|
00 |
01 |
11 |
10 |
||
|
A B |
00 |
0 |
0 |
1 |
1 |
|
01 |
1 |
1 |
1 |
1 |
|
|
11 |
1 |
1 |
1 |
1 |
|
|
10 |
1 |
1 |
1 |
1 |
A+B+C