    New chain ID            Original chain ID

30qz-pdb-bundle1.pdb:
           a                         a
           b                         b
           c                         c
           d                         d

30qz-pdb-bundle2.pdb:
           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                         0
           1                         1
           2                         2
           3                         3
           6                         6
           V                         V
           Z                         Z
