program cutii;
{$APPTYPE CONSOLE}  
uses  
  SysUtils;   
type cutie = record  
        x,y,z:integer;   
        ok,k:boolean;   
end;   
var j,max,o,q,s,t,c,i,n,m,b:integer;   
    v:array [1..3500] of cutie;   
    fin,fout:text;
{*---------------------------------------*}  
begin  
        assign(fin,'cutii.in'); reset(fin);   
        assign(fout,'cutii.out'); rewrite(fout);   
        readln(fin,n,t);   
        for q:=1 to t do  
        begin  
                c:=0;   
                For i:=1 to n do  
                begin  
                        readln(fin,v[i].x,v[i].y,v[i].z);   
                        v[i].ok:=true;   
                        v[i].k:=true;   
                end;  max:=0;
  
                for i:=1 to n do  
                        //if v[i].ok then   
                        begin  
                                // o:=0;
                                  c:=1;
                                for j:=1 to n do  
                                begin  
                                       // if (v[j].ok) and (i<>j) then
                                       // begin
                                               // s:=v[j].x+v[j].y+v[j].z;
                                                if (v[i].x>v[j].x) and (v[i].y>v[j].y) and (v[i].z>v[j].z)  then
                                                begin  
                                                        //max:=s;   
                                                       // o:=j;
                                                        c:=c+1;
                                                end;
                                       // end;
                                end;   
                             {   if o > 0 then
                                begin  
                                       // v[i].ok:=false;   
                                        v[i].k:=false ;   
                                        v[o].k:=false;   
                                        v[o].ok:=false;//sa nu mai fie bagata in alta   
                                        //v[o].ok:=false;   
                                   //     c:=c+1;   
                                end;  }
                                if c>max then max:=c; 
                        end;   
                  // for i:=1 to n do if not v[i].k then inc(c);
                   writeln(fout,c);   
  
        end;   
  
  
        close(fin);   
        close(fout);   
end.