X
		1	2	3
Y	1	1	2	3	6
	2	2	4	6	12
	3	3	6	9	18
		6	12	18	36
	k	2.778%
		1	2	3
	1	2.8%	5.6%	8.3%
	2	5.6%	11.1%	16.7%
	3	8.3%	16.7%	25.0%
					100.0%