    New chain ID            Original chain ID

6pep-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                        AM
           M                        AN
           N                        AO
           O                        AP
           P                        AQ
           Q                        AR
           R                        AS
           S                        AT
           T                        AU
           U                        AV
           V                        AW
           W                        AX
           X                        AY
           Y                        AZ
           Z                         B
           a                        BA
           b                        BB
           c                        BC
           d                        BD
           e                        BE
           f                         C
           g                         D
           h                         E
           i                         F
           j                         G
           k                         H
           l                         I
           m                         J
           n                         K
           o                         L
           p                         M
           q                         N
           r                         O
           s                         P
           t                         Q
           u                         R
           v                         S
           w                         T
           x                         U
           y                         V
           z                         W
           0                         X
           1                         Y
           2                         Z
           3                         a
           4                         b
           5                         c
           6                         d
           7                         e
           8                         f
           9                         g

6pep-pdb-bundle2.pdb:
           h                         h
           i                         i
           j                         j
           k                         k
           l                         l
           m                         m
           n                         n
