Program cutii;
 type dimens=record
              x,y,z:integer;
              end;
 var n,t,i,j,max,p,m,s,q,posmax:integer;
     a: array [1..3500] of dimens;
     b, maxval: array [1..3500] of integer;
     b1,b2:array [1..1 shl 12] of char;
     fi, fo:text;
begin
assign(fi,'cutii.in');
 assign(fo,'cutii.out');
settextbuf(fi,b1);
 settextbuf(fo,b2);
reset(fi);
rewrite(fo);
 readln(fi,n,t);
  for m:=1 to t do begin
               q:=0;
               for i:=1 to n do begin
                      read(fi,s); a[s].x:=s;
                      if s>q then q:=s;
                readln(fi,a[s].y,a[s].z);
                end;
               b[q]:=1; max:=0;
               maxval[q]:=1;
                for i:=q-1 downto 1 do begin
                                     for j:=i+1 to q do begin
                                     if maxval[j]<b[i] then break;
  if (a[j].y>a[i].y) and (a[j].z>a[i].z) and (b[j]>b[i]) then b[i]:=b[j];
                                         end;
                                         inc(b[i]);
                                         if b[i]>max then max:=b[i];
                                     if maxval[i+1]>b[i] then maxval[i]:=maxval[i+1]
                                      else maxval[i]:=b[i];
                                     end;
                  writeln(fo,max);
               for i:=1 to q-1 do b[i]:=0;
                 end;
  close(fo);
end.