    New chain ID            Original chain ID

9ww4-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH

9ww4-pdb-bundle2.pdb:
           A                        AI
           B                        AJ
           C                        AK
           D                        AL
           E                        AM
           F                        AN
           G                        AO
           H                        AP
           I                        AQ
           J                        AR
           K                        AS
           L                        AT
           M                        AU
           N                        AV
           O                        AW
           P                        AX
           Q                        AY
           R                        AZ
           S                        Aa
           T                        Ab
           U                        Ac
           V                        Ad
           W                        Ae
           X                        Af
           Y                        Ag
           Z                        Ah
           a                        Ai
           b                        Aj
           c                        Ak
           d                        Al
           e                        Am
           f                        An
           g                        Ao
           h                        Ap
           i                        Aq
           j                        Ar
           k                        As
           l                        BA
           m                        BB
           n                        BC
           o                        BD
           p                        BE
           q                        BF
           r                        BG
           s                        BH
           t                        BI
           u                        BJ
           v                        BK
           w                        BL
           x                        BM
           y                        BN
           z                        BO
           0                        BP
           1                        BQ
           2                        BR

9ww4-pdb-bundle3.pdb:
           A                        BS
           B                        BT
           C                        BU
           D                        BV
           E                        BW
           F                        BX
           G                        BY
           H                        BZ
           I                        Ba
           J                        Bb
           K                        Bc
           L                        Bd
           M                        Be
           N                        Bf
           O                        Bg
           P                        Bh
