    New chain ID            Original chain ID

9s7e-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         D
           D                         E
           E                         F
           F                         H
           G                         I
           H                         J
           I                         K
           J                         L
           K                         M
           L                         N
           M                         O
           N                         P
           O                         Q
           P                         R
           Q                         S
           R                         T
           S                         U
           T                         V
           U                         W
           V                         X
           W                         Y
           X                         Z
           Y                        AA
           Z                        AB
           a                        AC
           b                         0
           c                         1
           d                         2
           e                         3
           f                         4
           g                         z
           h                         w
           i                         x

9s7e-pdb-bundle2.pdb:
           A                         5
           B                         6
           C                         7
           D                         8
           E                         9
           F                         a
           G                         b
           H                         c
           I                         e
           J                         f
           K                         g
           L                         h
           M                         i
           N                         j
           O                         k
           P                         l
           Q                         m
           R                         o
           S                         p
           T                         q
           U                         r
           V                         s
           W                         t
           X                         u
           Y                         v
           Z                         y
           a                        AD
           b                        AE
           c                        AF
           d                        AG
           e                        AH
           f                        AI
           g                        AJ
           h                        AK
           i                        AL
           j                        AM
           k                        AN
           l                        AO
           m                        AP
           n                        AQ
           o                        AR
           p                        AS
           q                        AT
           r                        AU
           s                        AV
           t                        AW
           u                        AX
           v                        AY
           w                        AZ
           x                        A0
           y                        A1
           z                        A2
           0                        A3
           1                        A4
           2                        Az
           3                        Av
           4                        Aw
           5                        Ax
           6                         d
           7                        Au
