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