BEGIN{
        new=0
        previous=-1
        new_atom=1
     }

{
    if ($1=="ATOM" )
        {
        current=$5
         if (current!=previous)
                {
                new+=1
                previous=current
                }
           printf "ATOM  %5d %4s %3s %5d   %8.3f%8.3f%8.3f %5s %5.2f      %4s\n", \
                   new_atom, $3, $4, new, $6, $7, $8, $9, $10, $11
                                                                                                                            
           new_atom+=1
         }
                                                                                                                            
}
                                                                                                                            
END{print "END"
}