#!/bin/ksh

echo > aux

while read label
do
   valor=1
   echo $label | grep "AS-"
   if [ $? -eq 0 ]
   then
      while read labelold
      do
         if [ "${label}" = "${labelold}" ]
         then
            #echo "encon" >aux2
            valor=0
            echo $valor
            break
         fi
         echo $valor #<--- Allways is 1
      done < hosts.old
      if [$valor -eq 1]
      then
         echo "$label" >> aux
      fi
   fi
done < hosts