<IDCHAR=x>

<IDCHAR=x>

Consecutive character. X indicates the number of characters.

<IDCHAR=1> A, B, C, ... X, Y, Z, AA, AB, AC, ...

<IDCHAR=2> AA, AB, AC, ... AX, AY, AZ, BA, BB, BC, ... ZY, ZZ, AAA, AAB, ...