trap exit ERR
for i in 0 1 2 3 4
do for j in 0 1 2 3 4 5 6 7 8 9
   do aname="xxxS01E${i}${j}yyy"
      rname="wwwS01E${i}${j}yyy"
      if [ -f "$aname.avi" -a -f "$rname.srt" ]
      then mv "$rname.str" "$aname.str"
      fi
   done
done