    New chain ID            Original chain ID

7oyd-pdb-bundle1.pdb:
           x                         x
           5                         5
           8                         8

7oyd-pdb-bundle2.pdb:
           A                         9
           B                         A
           C                        AA
           D                        Aa
           E                         B
           F                        BB
           G                        Bb
           H                         C
           I                        CC
           J                        Cc
           K                         D
           L                        DD
           M                        Dd
           N                         E
           O                        EE
           P                        Ee
           Q                         F
           R                        FF
           S                         G
           T                        GG
           U                        Gg
           V                         H
           W                        HH
           X                         I
           Y                        II
           Z                         J
           a                        JJ
           b                         K
           c                        KK
           d                         L
           e                        LL
           f                         M
           g                         N
           h                        NN
           i                         O
           j                        OO
           k                         P
           l                        PP
           m                         Q
           n                        QQ
           o                         R
           p                        RR

7oyd-pdb-bundle3.pdb:
           A                         S
           B                        SS
           C                         T
           D                        TT
           E                         U
           F                        UU
           G                         V
           H                        VV
           I                         W
           J                        WW
           K                         X
           L                        XX
           M                         Y
           N                        YY
           O                         Z
           P                        ZZ
           Q                         a
           R                         b
           S                         c
           T                         d
           U                         e
           V                         f
           W                         g
           X                         h
           Y                         i
           Z                         j
           a                         k
           b                         l
           c                         m
           d                         n
           e                         o
           f                         p
           g                         r
           h                         s
           i                        s1
           j                         t
           k                         v
           l                         w
