    New chain ID            Original chain ID

6pwb-pdb-bundle1.pdb:
           A                        AG
           B                        AH
           C                        AI
           D                        AL
           E                        AM
           F                        AO
           G                        AR
           H                        AU
           I                        BA
           J                        BB
           K                        BC
           L                        BD
           M                        BE
           N                        BF
           O                        BG
           P                        BH
           Q                        BI
           R                        BJ
           S                        BK
           T                        BL
           U                        BM
           V                        BN
           W                        BO
           X                        BP
           Y                        CA
           Z                        CB
           a                        CC
           b                        CD
           c                        CE
           d                        CF
           e                        CG
           f                        CH
           g                        CI
           h                        CJ
           i                        CK
           j                        BS
           k                        BT
           l                        BU
           m                        BV
           n                        BW
           o                        BX
           p                        BY
           q                        BZ
           r                        DA
           s                        DB
           t                        DC
           u                        DD
           v                        DE
           w                        DF
           x                        CL
           y                        CM
           z                        CN
           0                        CO
           1                        CP
           2                        CQ
           3                        CR
           4                        CS
           5                        CT
           6                        CU
           7                        CV
           8                        CW
           9                        CX

6pwb-pdb-bundle2.pdb:
           A                        CY
           B                        CZ
           C                        EA
           D                        DG
           E                        DH
           F                        DI
           G                        DJ
           H                        DK
           I                        DL
           J                        DM
           K                        DN
           L                        DO
           M                        DP
           N                        DQ
           O                        DR
           P                        DS
           Q                        DT
           R                        DU
           S                        DV
           T                        DW
           U                        DX
           V                        DY
           W                        DZ
           X                        EB
           Y                        EC
           Z                        ED
           a                        EE
           b                        EF
           c                        EG
           d                        EH
           e                        EI
           f                        EJ
           g                        EK
           h                        EL
           i                        EM
           j                        EN
           k                        EO
           l                        EP
           m                        EQ
           n                        ER
           o                        ES
           p                        ET
           q                        EU
           r                        EV
           s                        FA
           t                        FB
           u                        FC
           v                        FD
           w                        FE
           x                        FF
           y                        FG
           z                        FH
           0                        FI
           1                        FJ
           2                        FK
           3                        FL
           4                        FM
           5                        FN
           6                        FO
           7                        FP
           8                        FQ
           9                        EW

6pwb-pdb-bundle3.pdb:
           A                        EX
           B                        EY
           C                        EZ
           D                        GA
           E                        GB
           F                        GC
           G                        GE
           H                        GF
           I                        GG
           J                        GH
           K                        GI
           L                        GJ
           M                        GK
           N                        GL
           O                        FR
           P                        FS
           Q                        FT
           R                        FU
           S                        FV
           T                        FW
           U                        FX
           V                        HB
           W                        HC
           X                        HE
           Y                        HF
           Z                        GM
           a                        GN
           b                        GO
           c                        GP
           d                        GQ
           e                        GR
           f                        GV
           g                        GW
           h                        GZ
           i                        HH
           j                        HI
           k                        HJ
           l                        HK
           m                        HL
