    New chain ID            Original chain ID

7mdz-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                         F
           G                         G
           H                         H
           I                         I
           J                         J
           K                         L
           L                         M
           M                         N
           N                         O
           O                         P
           P                         Q
           Q                         R
           R                         S
           S                         T
           T                         U
           U                         V
           V                         W
           W                         X
           X                         Y
           Y                         Z
           Z                         a
           a                         b
           b                         c
           c                         d
           d                         e
           e                         f
           f                         g
           g                         h
           h                         i
           i                         j
           j                         k
           k                         l
           l                         m
           m                         n
           n                         o
           o                         p
           p                         r
           q                        AA
           r                        BB
           s                        CC
           t                        DD
           u                        EE
           v                        FF
           w                        GG
           x                        HH
           y                        II
           z                        JJ
           0                        KK
           1                        LL
           2                        MM
           3                        NN
           4                        OO
           5                        PP
           6                        QQ
           7                        RR
           8                        SS
           9                        TT

7mdz-pdb-bundle2.pdb:
           A                        UU
           B                        VV
           C                        WW
           D                        XX
           E                        YY
           F                        ZZ
           G                        aa
           H                        bb
           I                        cc
           J                        dd
           K                        ee
           L                        ff
           M                        gg
           N                         5
           O                         7
           P                         8
           Q                         2

7mdz-pdb-bundle3.pdb:
           9                         9
           6                         6
