    New chain ID            Original chain ID

7zuw-pdb-bundle1.pdb:
           2                         2
           3                         3
           4                         4

7zuw-pdb-bundle2.pdb:
           A                         5
           B                         6
           C                        AA
           D                        AB
           E                        AC
           F                        AD
           G                        AE
           H                        AF
           I                        AG
           J                        AH
           K                        AI
           L                        AJ
           M                        AK
           N                        AL
           O                        AM
           P                        AN
           Q                        AO
           R                        AP
           S                        AQ
           T                        AR
           U                        AS
           V                        AT
           W                        AU
           X                        AV
           Y                        AW
           Z                        AX

7zuw-pdb-bundle3.pdb:
           A                        AY
           B                        AZ
           C                        Aa
           D                        Ab
           E                        Ac
           F                        Ad
           G                        Ae
           H                        Af
           I                        Ag
           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                        Bk
           u                        Bl
           v                        Bm
           w                        Bn
           x                        Bo
           y                        CA
           z                        CB
           0                        CC
