    New chain ID            Original chain ID

9sww-pdb-bundle1.pdb:
           A                         0
           B                         6
           C                         9
           D                         A
           E                        AC
           F                        AD
           G                        AG
           H                        AH
           I                        AK
           J                        AL
           K                        AM
           L                        AN
           M                        AO
           N                        AP
           O                        AQ
           P                        AR
           Q                        AS
           R                        AT
           S                        AU
           T                        AV
           U                         B
           V                         C
           W                         D
           X                         E
           Y                         F
           Z                         G
           a                         H
           b                         I
           c                         J
           d                         K
           e                         L
           f                         M
           g                         N
           h                         O
           i                         P
           j                         Q
           k                         R
           l                         S
           m                         T
           n                         V
           o                         W
           p                         X
           q                         a
           r                         b
           s                         e
           t                         f
           u                         j
