    New chain ID            Original chain ID

7uck-pdb-bundle1.pdb:
           2                         2
           1                         1
           5                         5
           7                         7
           8                         8

7uck-pdb-bundle2.pdb:
           A                         9
           B                         A
           C                         B
           D                         C
           E                         D
           F                         E
           G                         F
           H                         G
           I                         H
           J                         I
           K                         J
           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
           q                         r
           r                        AA
           s                        BB
           t                        CC
           u                        DD
           v                        EE
           w                        FF

7uck-pdb-bundle3.pdb:
           A                        GG
           B                        HH
           C                        II
           D                        JJ
           E                        KK
           F                        LL
           G                        NN
           H                        OO
           I                        PP
           J                        QQ
           K                        RR
           L                        SS
           M                        TT
           N                        UU
           O                        VV
           P                        WW
           Q                        XX
           R                        YY
           S                        ZZ
           T                        Aa
           U                        Bb
           V                        Cc
           W                        Dd
           X                        Ee
           Y                        Gg
