xx	1	0
xx	2	0
xx	3	0
xx	4	0
xx	5	0
xx	6	1
xx	7	1
xx	8	1
xx	9	0
xx	10	0
xx	11	0
xx	12	0
xx	13	0
xx	14	0
xx	15	0
xx	16	0
xx	17	0
xx	18	0
xx	19	0
xx	20	0
xn	1	0
xn	2	0
xn	3	0
xn	4	0
xn	5	0
xn	6	0
xn	7	0
xn	8	0
xn	9	0
xn	10	0
xn	11	0
xn	12	0
xn	13	1
xn	14	1
xn	15	1
xn	16	0
xn	17	0
xn	18	0
xn	19	0
xn	20	0