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