A	B	C	D	Z
0	0	0	0	0
1	0	0	0	0
1	1	0	0	0
0	1	0	0	0
0	1	1	0	0
1	1	1	0	0
1	0	1	0	0
0	0	1	0	0
0	0	1	1	0
1	0	1	1	0
1	1	1	1	1
0	1	1	1	0
0	1	0	1	0
1	1	0	1	0
1	0	0	1	0
0	0	0	1	0

function: Z = (A && B && C && D)