    New chain ID            Original chain ID

6tdu-pdb-bundle1.pdb:
           A                         A
           D                         D
           E                         E
           F                         F
           G                         G
           H                         H
           I                         I
           J                         J
           K                         K
           L                         L
           M                         M
           N                         N
           O                         O
           P                         P
           Q                         Q
           R                         R
           S                         S
           T                         T
           a                         a
           d                         d
           e                         e
           f                         f
           g                         g
           h                         h
           i                         i
           j                         j
           k                         k
           l                         l
           m                         m
           n                         n
           o                         o
           p                         p
           q                         q
           r                         r
           s                         s
           t                         t

6tdu-pdb-bundle2.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AF
           G                        AG
           H                        AH
           I                        AI
           J                        AJ
           K                        AK
           L                        AL
           M                        AM
           N                        AN
           O                        AO
           P                        AP
           Q                        AQ
           R                        AR
           S                        AS
           T                        AT
           U                        AU
           V                        AV
           W                        AW
           X                        AX
           Y                         B
           Z                         C
           a                        BA

6tdu-pdb-bundle3.pdb:
           A                        BB
           B                        BC
           C                        BD
           D                        BE
           E                        BF
           F                        BG
           G                        BH
           H                        BI
           I                        BJ
           J                        BK
           K                        BL
           L                        BM
           M                        BN
           N                        BO
           O                        BP
           P                        BQ
           Q                        BR
           R                        BS
           S                        BT
           T                        BU
           U                        BV
           V                        BW
           W                        BX
           X                         b
           Y                         c
