"chromosome"	"length"
"1"	"249250621"
"2"	"243199373"
"3"	"198022430"
"4"	"191154276"
"5"	"180915260"
"6"	"171115067"
"7"	"159138663"
"X"	"155270560"
"8"	"146364022"
"9"	"141213431"
"10"	"135534747"
"11"	"135006516"
"12"	"133851895"
"13"	"115169878"
"14"	"107349540"
"15"	"102531392"
"16"	"90354753"
"17"	"81195210"
"18"	"78077248"
"20"	"63025520"
"Y"	"59373566"
"19"	"59128983"
"22"	"51304566"
"21"	"48129895"
"MT"	"16569"