    New chain ID            Original chain ID

6snt-pdb-bundle1.pdb:
           2                         2
           A                         A
           B                         B
           P                         P
           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
           Q                         Q
           R                         R
           S                         S
           T                         T
           U                         U
           V                         V
           W                         W
           X                         X
           Y                         Y
           Z                         Z
           a                         a
           b                         b
           d                         d
           e                         e
           f                         f
           g                         g
           c                         c
           4                         4
           3                         3
           h                         h
           i                         i
           j                         j
           k                         k
           l                         l
           m                         m
           n                         n
           o                         o
           p                         p

6snt-pdb-bundle2.pdb:
           A                         q
           B                         r
           C                         s
           D                         t
           E                         u
           F                         v
           G                         w
           H                         x
           I                         y
           J                         z
           K                        au
           L                        AB
           M                        at
           N                        as
           O                        ar
           P                        aq
           Q                        ap
           R                        ao
           S                        an
           T                        am
           U                        al
           V                        ak
           W                        aj
           X                        ai
           Y                        ah
           Z                        ag
           a                        af
           b                        ae
           c                        ad
           d                        ac
           e                        ab
           f                        aa
           g                         1

6snt-pdb-bundle3.pdb:
           A                         5
           B                        NC
           C                         6
