    New chain ID            Original chain ID

6x66-pdb-bundle1.pdb:
           A                        AC
           B                        AD
           C                        AH
           D                        AK
           E                        AX
           F                        AY
           G                        AZ
           H                        Ad
           I                        BC
           J                        BD
           K                        BH
           L                        BK
           M                        BX
           N                        BY
           O                        BZ
           P                        Bd
           Q                        CC
           R                        CD
           S                        CH
           T                        CK
           U                        CX
           V                        CY
           W                        CZ
           X                        Cd
           Y                        DC
           Z                        DD
           a                        DH
           b                        DK
           c                        DX
           d                        DY
           e                        DZ
           f                        Dd
           g                        EC
           h                        ED
           i                        EH
           j                        EK
           k                        EX
           l                        EY
           m                        EZ
           n                        Ed
           o                        FC
           p                        FD
           q                        FH
           r                        FK
           s                        FX
           t                        FY
           u                        FZ
           v                        Fd
           w                        GC
           x                        GD
           y                        GH
           z                        GK
           0                        GX
           1                        GY
           2                        GZ
           3                        Gd
           4                        HC
           5                        HD
           6                        HH
           7                        HK
           8                        HX
           9                        HY

6x66-pdb-bundle2.pdb:
           A                        HZ
           B                        Hd
           C                        IC
           D                        ID
           E                        IH
           F                        IK
           G                        IX
           H                        IY
           I                        IZ
           J                        Id
           K                        JC
           L                        JD
           M                        JH
           N                        JK
           O                        JX
           P                        JY
           Q                        JZ
           R                        Jd
           S                        KC
           T                        KD
           U                        KH
           V                        KK
           W                        KX
           X                        KY
           Y                        KZ
           Z                        Kd
           a                        LC
           b                        LD
           c                        LH
           d                        LK
           e                        LX
           f                        LY
           g                        LZ
           h                        Ld
           i                        MC
           j                        MD
           k                        MH
           l                        MK
           m                        MX
           n                        MY
           o                        MZ
           p                        Md
           q                        AA
           r                        BA
           s                        CA
           t                        DA
           u                        EA
           v                        FA
           w                        GA
           x                        HA
           y                        IA
           z                        JA
           0                        KA
           1                        LA
           2                        QA
