    New chain ID            Original chain ID

4v8s-pdb-bundle1.pdb:
           A                        AC
           B                        AD
           C                        AI
           D                        AJ
           E                        AM
           F                        AO
           G                        AR
           H                        AS
           I                        AT
           J                        AU
           K                        AV
           L                        AW
           M                        AX
           N                        AY
           O                        AZ
           P                        BA
           Q                        BB
           R                        BC
           S                        BD

4v8s-pdb-bundle2.pdb:
           A                        BE
           B                        BF
           C                        BG
           D                        BH
           E                        BK
           F                        BL
           G                        BN
           H                        BP
           I                        BQ
           J                        BR
           K                        BS
