program bing;
type
 aa=array[1..2000] of longint;
var
 f1,f2:text;
 n,i,j,k,s:longint;
 m,t:integer;
 d:aa;
 ai,bi:longint;
 a:array[1..1000000] of integer;
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]);
 s:=1000000;
 i:=1;j:=1;
 k:=1;t:=1;
 fillchar(d,sizeof(d),0);
 d[a[1]]:=1;
 for k:=2 to n do
 begin
 if a[k]=a[i] then
 begin
  inc(i);
  dec(d[a[k]]);
  if d[a[k]]=0 then dec(t);
 end;
 inc(j);
 inc(d[a[k]]);
 if d[a[k]]=1 then inc(t);
 if t=m then
 if s>j-i then
 begin
  s:=j-i;
  ai:=i;bi:=j;
 end;
 end;
 writeln(f2,ai,' ',bi);
 close(f1);close(f2);
end.