Greps DNS zone transfer info on domain localdomain.com from NS @dc1.localdomain.com, finds strings with any-cased word 'Lawler' and strips last letter from each string.
VAR=`dig axfr @dc1.localdomain.com localdomain.com | grep -i Lawler | awk '{ getline ; $1=substr($1,1,length($1)-1); print $1 ; exit }'`