string 1: 0
string 2: 1
string 3: 0
string 4: 1
string 5: 0

1 & 2 -> 01 10
1 & 3 -> 00 00
1 & 4 -> 01 10
1 & 5 -> 00 00
2 & 3 -> 10 01
2 & 4 -> 11 11
2 & 5 -> 10 01
3 & 4 -> 01 10
3 & 5 -> 00 00
4 & 5 -> 10 01

Totals

01 = 6
10 = 6
11 = 2
00 = 6