Key    Matches
1      0
2      0
3      0
4      23
5      0
6      1
7      0
8      4
9      1
10     0
11     2
12     1
13     0
14     0
15     2
16     0
17     1
18     0
19     2
20     0
21     2
22     1
23     0
24     2
25     0
26     0
27     0
28     0
29     0
30     0
31     0
32     0
33     0
34     0
35     0
36     0
37     0
38     0
39     0
40     0
41     0
42     0
43     1
44     0
45     0
46     0
47     0
48     0
49     0
50     0
51     0
52     0
53     0
54     0
55     0
56     0
57     0
58     0
59     0
60     0
61     0
62     0
63     0
64     0
65     0
66     0
67     0
68     0
69     1
70     0
71     0

Correct Key is 4