program exhibit;
var a:array[1..1000000]of longint;
    bo:array[1..2000]of longint;
    t,k,m,n,j,min,x,y,re:longint;
    g:text;
procedure search(i:longint);
var j:longint;
begin
for j:=i+1 to t do
  if a[j]=1 then
    begin
      min:=j;
      bo[k]:=t;
      exit;
    end;
end;
begin
assign(g,'exhibit.in');
reset(g);
readln(g,m,n);
min:=1;
for t:=1 to m do
  begin
    read(g,k);
    a[t]:=1;
    if bo[k]=0 then
      begin
        inc(j);
        bo[k]:=t;
      end
    else
      begin
        if bo[k]=min then search(bo[k])
        else begin a[bo[k]]:=0;bo[k]:=t;end;
      end;
    if (j=n)and((t-min<re)or(re=0)) then
      begin
        re:=t-min;
        x:=min;
        y:=t;
      end;
  end;
assign(g,'exhibit.out');
rewrite(g);
writeln(g,x,' ',y);
close(g);
end.