    New chain ID            Original chain ID

8rve-pdb-bundle1.pdb:
           A                         0
           B                         1
           C                         2
           D                         3
           E                         4
           F                         5
           G                         6
           H                         7
           I                         8
           J                         9
           K                         A
           L                        AA
           M                        AB
           N                        AC
           O                        AD
           P                        AE
           Q                        AF
           R                        AG
           S                        AH
           T                        AI
           U                        AJ
           V                        AK
           W                        AL
           X                        AM
           Y                        AN
           Z                        AO
           a                        AP
           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                         Q
           r                         R
           s                         S
           t                         T
           u                         U
           v                         V
           w                         W
           x                         X
           y                         Y
           z                         Z
           0                         a
           1                         b
           2                         c
           3                         d
           4                         e
           5                         f
           6                         g
           7                         h
           8                         i
           9                         j

8rve-pdb-bundle2.pdb:
           k                         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
