i = 1
2,1&19,-1: 4
i = 2
6,0&15,-1: 7
i = 3
6,1&8,1: 4
i = 4
10,1&12,-1: 4
i = 5
14,0&8,1: 7
i = 6
14,1&15,1: 4
i = 7
18,-1&19,1: 4
i = 8
14,0&23,1: 7
i = 9
14,-1&30,-1: 4
i = 10
10,-1&26,1: 4
i = 11
6,0&30,-1: 7
i = 12
6,-1&23,-1: 4
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