    New chain ID            Original chain ID

7aih-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           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
           U                         U
           V                         V
           W                         W
           X                         X
           Y                         Y
           Z                         Z
           a                        BA
           b                        UA
           c                        BB
           d                        Aw
           e                        Bj
           f                        An
           g                        Al
           h                        BI
           i                        Az
           j                        At
           k                        BC
           l                        Ab
           m                        Ai
           n                        Ap
           o                        Au
           p                        Aa
           q                        Ao
           r                        BM
           s                        Ar
           t                        Aj
           u                        BH
           v                        Am
           w                        Aq
           x                        BE
           y                        Ak
           z                        BP
           0                        Ad
           1                        BF
           2                        Av

7aih-pdb-bundle2.pdb:
           A                        Af
           B                        As
           C                        Ae
           D                        Ac
           E                        Ah
           F                        BD
           G                        Ay
           H                        Ag
           I                        Ax
           J                        BL
           K                        BO
           L                        BG
           M                        UB
           N                        UC
           O                        UD
           P                         1
