    New chain ID            Original chain ID

6ahd-pdb-bundle1.pdb:
           A                         A
           B                         I
           C                         B
           D                         F
           E                         G
           F                         O
           G                         C
           H                         N
           I                         M
           J                         L
           K                         9
           L                         J
           M                         a
           N                         b
           O                         c
           P                         d
           Q                         e
           R                         f
           S                         g
           T                         E
           U                         X
           V                         W
           W                        A0
           X                         0
           Y                         Z
           Z                         8
           a                         Y
           b                         H
           c                         h
           d                         i
           e                         j
           f                         k
           g                         l
           h                         m
           i                         n
           j                         o
           k                         p
           l                         u
           m                         v
           n                         w
           o                         q
           p                         r
           q                         s
           r                         t
           s                         x
           t                         y
           u                         z
           v                         P
           w                         Q
           x                         R
           y                         S
           z                         T
           0                         U
           1                         V
           2                         K
           3                         1
           4                         3
           5                         5
           6                         6
           7                         7
           8                         2
           9                         4

6ahd-pdb-bundle2.pdb:
           D                         D
