#!/usr/bin/awk -f
BEGIN {
  FS=":";
  while ( getline < "/etc/passwd" )
  {
    if ( max_group < $4 )
      max_group = $4;
    group_count[$4]++;
  }
  while ( getline < "/etc/group" )
    group_name[$3] = $1;
  for ( i=0; i<=max_group; i++ )
    if ( group_count[i] )
      print "A(z) \"" group_name[i] "\" csoportban " group_count[i] " felhasznalo van";
}