public static void main ( String args [ ] ) {
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  String [ ] arr = new String [ n ] ;
  int maxi [ ] = new int [ m ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    arr [ i ] = sc . next ( ) ;
    for ( int j = 0 ;
    j < m ;
    j ++ ) {
      maxi [ j ] = Math . max ( maxi [ j ] , arr [ i ] . charAt ( j ) ) ;
    }
  }
  int res = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < m ;
    j ++ ) {
      if ( maxi [ j ] == arr [ i ] . charAt ( j ) ) {
        res ++ ;
        break ;
      }
    }
  }
  System . out . println ( res ) ;
}

public static void main ( String args [ ] ) { int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; String [ ] arr = new String [ n ] ; int maxi [ ] = new int [ m ] ; for ( int i = 0 ; i < n ; i ++ ) { arr [ i ] = sc . next ( ) ; for ( int j = 0 ; j < m ; j ++ ) { maxi [ j ] = Math . max ( maxi [ j ] , arr [ i ] . charAt ( j ) ) ; } } int res = 0 ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < m ; j ++ ) { if ( maxi [ j ] == arr [ i ] . charAt ( j ) ) { res ++ ; break ; } } } System . out . println ( res ) ; }
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