    New chain ID            Original chain ID

7old-pdb-bundle1.pdb:
           1                         1

7old-pdb-bundle2.pdb:
           A                         2
           B                         3
           C                         4
           D                         5
           E                         A
           F                         B
           G                         C
           H                        LA
           I                        LB
           J                        LC
           K                        LD
           L                        LE
           M                        LF
           N                        LG
           O                        LH
           P                        LI
           Q                        LJ
           R                        LK
           S                        LL
           T                        LM
           U                        LN
           V                        LO
           W                        LP
           X                        LQ
           Y                        LR
           Z                        LS
           a                        LT
           b                        LU
           c                        LV
           d                        LW
           e                        LX
           f                        LY
           g                        LZ
           h                        La
           i                        Lb
           j                        Lc
           k                        Ld
           l                        Le

7old-pdb-bundle3.pdb:
           A                        Lf
           B                        Lg
           C                        Lh
           D                        Li
           E                        Lj
           F                        Lk
           G                        Ll
           H                        Lm
           I                        Ln
           J                        Lo
           K                        Lp
           L                        Lq
           M                        Lr
           N                        Ls
           O                        SA
           P                        SB
           Q                        SC
           R                        SD
           S                        SE
           T                        SF
           U                        SG
           V                        SH
           W                        SI
           X                        SJ
           Y                        SK
           Z                        SL
           a                        SM
           b                        SN
           c                        SO
           d                        SP
           e                        SQ
           f                        SR
           g                        SS
           h                        ST
           i                        SU
           j                        SV
           k                        SW
           l                        SX
           m                        SY
           n                        SZ
           o                        Sa
           p                        Sb
           q                        Sc
           r                        Sd
           s                        Se
           t                        Sf
