chr1	chrI
chr10	chrX
chr11	chrXI
chr12	chrXII
chr13	chrXIII
chr14	chrXIV
chr15	chrXV
chr16	chrXVI
chr2	chrII
chr3	chrIII
chr4	chrIV
chr5	chrV
chr6	chrVI
chr7	chrVII
chr8	chrVIII
chr9	chrIX