Finding all combination with 3-digit pattern.

[LauChiFung]

datalines;

input id label $;

1 A

2 B

3 C

4 D

5 A ....

10000 A;

how can i find no of all 3-digit pattern?  label within A to M

[Kurt_Bremser · Accepted solution]

where 100 <= id <= 999 and 'A' <= label <= 'M';

 Edited b/c of numeric id.