chr	start	end	cn	loh
chr1	1	29999999	2	0
chr1	30000000	59490000	1	1
chr1	59490001	59499999	2	0
chr1	59500000	61590000	0	1
chr1	61590001	121499999	2	0
chr1	128900000	225000000	3	0
chr1	225001000	249250621	4	0
chr1	234920001	249250621	2	0
