program exhibit;
const
     maxn= 1000000;
var
     f1,f2:text;
     data: array[1..maxn] of longint;
     num: array[1..maxn] of longint;
     i,j,k,n,m: longint;
     l,r,a,b: longint;
     min,tot: longint;

procedure init;
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,data[i]);
     fillchar(num,sizeof(num),0);
end;
procedure main;
var
        t:longint;
begin
     min:=maxlongint;
     tot:=0;
     l:=0;r:=0;
     repeat
       if tot=m then begin
          inc(l);
          dec(num[data[l]]);
          if num[data[l]]=0 then dec(tot);
       end else begin
          inc(r);
          inc(num[data[r]]);
          if num[data[r]]=1 then inc(tot);
       end;
       if tot=m then begin
          t:=r-l;
          if t<min then begin
             min:=t;
             a:=l; b:=r;
          end;
       end;
     until r>=n;
end;
procedure print;
begin
     writeln(f2,a+1,' ',b);
     close(f1);
     close(f2);
end;
begin
     init;
     main;
     print;
end.