    New chain ID            Original chain ID

6v8i-pdb-bundle1.pdb:
           A                        AC
           B                        AD
           C                        AE
           D                        CF
           E                        CC
           F                        CD
           G                        CE
           H                        BF
           I                        BC
           J                        BD
           K                        BE
           L                        AF
           M                        BJ
           N                        BK
           O                        BL
           P                        DJ
           Q                        DK
           R                        DL
           S                        AJ
           T                        AK
           U                        AL
           V                        FJ
           W                        FK
           X                        FL
           Y                        CJ
           Z                        CK
           a                        CL
           b                        EJ
           c                        EK
           d                        EL
           e                        BN
           f                        BM
           g                        DN
           h                        DM
           i                        AN
           j                        AM
           k                        FN
           l                        FM
           m                        CN
           n                        CM
           o                        EN
           p                        EM
           q                        EB
           r                        EA
           s                        BB
           t                        BA
           u                        DB
           v                        DA
           w                        AB
           x                        AA
           y                        FB
           z                        FA
           0                        CB
           1                        CA
           2                        BH
           3                        BG
           4                        BI
           5                        DH

6v8i-pdb-bundle2.pdb:
           A                        DG
           B                        DI
           C                        AH
           D                        AG
           E                        AI
           F                        FH
           G                        FG
           H                        FI
           I                        CH
           J                        CG
           K                        CI
           L                        EH
           M                        EG
           N                        EI
