file-1
-------
K,01,Europe,Sweden,Mace,rank1,check,01234
J,02,Australia,Sydney,Syd,rank2,chek1,01234
K,01,China,chen,mar,rank4,chack,11234
J,02,japan,Syin,yhk,ranek,chek2,21234

file-2
-------
H,03,German,Ger,hgtk,rank4,hekc,1245
I,04,Negria,neg,ghsjk,rankk1,jusk,4562
K,01,Europe1,Sweden4,Mace1,rank15,check1,12234
K,02,Europe2,Sweden3,Mace2,rank14,check2,21234

file-3
-------
H,03,German2,Ger,hgtk,rank4,hekc,1245
I,04,Negria2,neg,ghsjk,rankk1,jusk,4562
K,11,Europe5,Sweden6,Mace3,rank16,check11,42234

file-4
-------
H,16,German2,Ger,hgtk,rank4,hekc,1245
I,17,Negria2,neg,ghsjk,rankk1,jusk,4562
K,11,Europe5,Sweden6,Mace3,rank16,check11,42234