alias c.check {
  var %a = $nick($1,0)
  var %b = 1
  var %c = 0
  var %d = 0
  while (%b <= %a) {
    if ($nick($1,%b) ison $2) {  inc %c }
    if ($nick($1,%b) !ison $2) { inc %d }
    inc %b
  }
  echo -a There are %c people from $1 that are also in $2
  echo -a There are %d people that are in $2 and not in $1
}