/* We want to parse the current ID LOLOBRIDGIDA195703F and end up with an ID of the first 5 letters and the last 7 digits to end up with LOLOB195703F */

data _null_;
  length id2 $12;
  id = 'LOLOBRIDGIDA195703F';
  id2 = substr(id,1,5)||reverse((substr(reverse(id),1,7)));
  put _all_;
run;

http://jaredprins.squarespace.com/blog/2008/5/15/fun-with-parsing-strings-in-sas.html

Need to construct and ID of the first 5 letters and the last 7 digits

SAS String Parsing

SAS