Provide your data as a DATA Step.
See this post on how to do it:
https://communities.sas.com/t5/SAS-Communities-Library/How-to-create-a-data-step-version-of-your-data-AKA-generate/ta-p/258712
Since your data is simple, you can write the DATA Step quite easy yourself, see example below
data tmp;
input
Id
Code $
;
cards;
1 A
2 A
3 B
;
... View more
