program exhibit;
var
  a:array[1..1000000]of integer;//du ru
  p:array[1..2000]of boolean;//cun zai
  a1,a2,n,m,head,tail,total,tl:longint;//
  f1,f2:text;
procedure init;
var i:longint;
begin
 assign(f1,'exhibit.in');reset(f1);
 assign(f2,'exhibit.out');rewrite(f2);
 readln(f1,n,m);
 for i:=1 to n do read(f1,a[i]);
end;

procedure go;
var i,j:longint;
    fg,fg2:boolean;
begin
 fg2:=true;
 repeat
  if tail-head+1>tl then begin break;fg2:=false;end;
  fillchar(p,sizeof(p),false);
  for i:=head to tail do p[a[i]]:=true;
  fg:=true;
  for i:=1 to m do if not p[i] then begin fg:=false;break;end;
  if not fg then inc(tail);
 until fg;

 if( fg2) and( tl>tail-head+1) then

          begin tl:=tail-head+1;
          a1:=head;a2:=tail; end;

end;

Begin
init;
head:=1;  total:=0;
tl:=1000000;    tail:=head+m-1;
repeat
 go;
 inc(head);
 tail:=head+m-1;
until head>=n-m;
writeln(f2,a1,' ',a2);
close(f1);close(f2);
end.