PROGRAM AA;
type
  mode=record
       s:integer;
       l:integer;
       end;
var
  se:set of 1..255;
  j,k,ll:integer;
  f:text;
  n,m,flag,head,js,min:integer;
  a:array[1..1000000]of integer;
  a1:array[1..1000000]of mode;
begin
  assign(f,'exhibit.in');
  reset(f);
  readln(f,n,m);
  for j:=1 to n do
   read(f,a[j]);
  close(f);

  head:=1;

  for j:=1 to n-m do
  begin

    se:=[1..m];
    k:=j;
    flag:=0;
    ll:=0;

    {while (flag=0)or (k<=n-m) do}
    repeat
     begin
      if a[k] in se then se:=se-[a[k]];
      inc(k);
      inc(ll);
      if se=[] then flag:=1;
     end;
     until (flag=1) or (k>n);

    if flag=1 then
     begin
      a1[head].s:=j;
      a1[head].l:=ll;
      inc(head);
     end;
  end;

  assign(f,'exhibit.out');
  rewrite(f);
  min:=maxint;
  for j:=1 to head-1 do
  if a1[j].l < min then begin min:=a1[j].l;k:=a1[j].s;end;
  writeln(f,k,' ',k+min-1);
  close(f);

end.