    New chain ID            Original chain ID

8oit-pdb-bundle1.pdb:
           A                        B1
           B                        B2
           C                        B3
           D                        B4
           E                        B5
           F                        B6
           G                        B7
           H                        B8
           I                        B9
           J                        BA
           K                        BB
           L                        BC
           M                        BD
           N                        BE
           O                        BF
           P                        BG
           Q                        BH
           R                        BI
           S                        BJ
           T                        BK
           U                        BL
           V                        BM
           W                        BN
           X                        BO
           Y                        BP
           Z                        BQ
           a                        BR
           b                        BS
           c                        BT
           d                        BU
           e                        BV
           f                        BW
           g                        BX
           h                        BY
           i                        BZ
           j                        Ba
           k                        Bb
           l                        Bc
           m                        Bd
           n                        Be
           o                        Bf
           p                        Bg
           q                        Bh
           r                        Bi
           s                        Bj
           t                        Bl
           u                        Bm
           v                        Bn
           w                        Bo
           x                        Bp
           y                        Bq
           z                        Br
           0                        Bs

8oit-pdb-bundle2.pdb:
           A                        Bt
           B                        Bu
           C                        Bv
           D                        Bw
           E                        Bx
           F                        By
           G                        Bz
           H                        AG
           I                        Aa
