public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  String ans [ ] = new String [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) ans [ i ] = sc . next ( ) ;
  int points [ ] = new int [ m ] ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) points [ i ] = sc . nextInt ( ) ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    int count [ ] = new int [ 5 ] ;
    for ( int j = 0 ;
    j < n ;
    j ++ ) count [ ans [ j ] . charAt ( i ) - 'A' ] ++ ;
    int max = 0 ;
    for ( int j = 0 ;
    j < 5 ;
    j ++ ) max = Math . max ( max , count [ j ] ) ;
    sum += points [ i ] * max ;
  }
  System . out . println ( sum ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; String ans [ ] = new String [ n ] ; for ( int i = 0 ; i < n ; i ++ ) ans [ i ] = sc . next ( ) ; int points [ ] = new int [ m ] ; for ( int i = 0 ; i < m ; i ++ ) points [ i ] = sc . nextInt ( ) ; int sum = 0 ; for ( int i = 0 ; i < m ; i ++ ) { int count [ ] = new int [ 5 ] ; for ( int j = 0 ; j < n ; j ++ ) count [ ans [ j ] . charAt ( i ) - ' A ' ] ++ ; int max = 0 ; for ( int j = 0 ; j < 5 ; j ++ ) max = Math . max ( max , count [ j ] ) ; sum += points [ i ] * max ; } System . out . println ( sum ) ; }
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