public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  String [ ] S = new String [ n ] ;
  int [ ] maxm = new int [ m ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    S [ i ] = sc . next ( ) ;
  }
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    int max = 0 ;
    for ( int j = 0 ;
    j < n ;
    j ++ ) {
      char c = S [ j ] . charAt ( i ) ;
      String str = String . valueOf ( c ) ;
      int temp = Integer . parseInt ( str ) ;
      if ( temp > max ) max = temp ;
    }
    maxm [ i ] = max ;
  };
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; String [ ] S = new String [ n ] ; int [ ] maxm = new int [ m ] ; for ( int i = 0 ; i < n ; i ++ ) { S [ i ] = sc . next ( ) ; } for ( int i = 0 ; i < m ; i ++ ) { int max = 0 ; for ( int j = 0 ; j < n ; j ++ ) { char c = S [ j ] . charAt ( i ) ; String str = String . valueOf ( c ) ; int temp = Integer . parseInt ( str ) ; if ( temp > max ) max = temp ; } maxm [ i ] = max ; } ; }
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