a=
b=
for t in tmp/*.txt
do
  C=`wc -c < $t`
  L=`wc -l < $t`
  V=`expr 1000 + $C - $L \* 30`
  case X"$V" in
  X-*)
    b="$b $t"
    ;;
  *)
    a="$a $t"
    ;;
  esac
done
more $a