[1,2],[1,3],[1,4],
[2,3],[2,4],
[3,4],
[4,5],[23,4],
[5,6],[5,7],[5,8],
[6,7],
[7,8],
[8,9],[10,8],
[10,9],[11,9],[12,9],[13,9],
[10,13],
[11,12],[11,13],
[12,13],
[13,14],
[14,15],[14,21],
[15,16],[15,17],[15,19],
[16,17],
[17,18],[17,19],
[18,19],[18,20],[18,21],
[19,20],[19,21],[19,22],
[20,23],
[21,22],[21,23],
[22,23],

11 12 13 9
15 16 17
15 17 19
17 18 19
18 19 20
18 19 21
19 21 22
21 22 23
1 2 3 4
10 13 9
10 8 9
13 14
14 15
14 21
20 23
5 6 7
5 7 8
23 4
4 5