    New chain ID            Original chain ID

9fpz-pdb-bundle1.pdb:
           A                         2
           B                         8
           C                         A
           D                         B
           E                         1
           F                        LC
           G                        LE
           H                        Lk
           I                        LY
           J                        Lh
           K                        LX
           L                        LR
           M                        Lr
