The input consists of four lines, each line containing a single digit 0 or 1.
none
0
1
1
0
0
0
0
0
0
0
1
0
0
0
1
0
1
0
0
0
1
1
0
0
1
0
0
1
0
0
1
0
1
0
0
1
1
1
0
1
0
0
0
1
1
1
0
0
1
1
0
1
0
1
0
1
1
0
1
0
0
0
1
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
1
1
a = int (input ());
b = int (input ());
c = int (input ());
d = int (input ());
print (((a ^ b) & (c | d)) ^ ((b & c) | (a ^ d)));