public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  final int C = sc . nextInt ( ) ;
  int [ ] [ ] A = new int [ 3 ] [ C + 1 ] ;
  int [ ] [ ] D = new int [ C + 1 ] [ C + 1 ] ;
  int [ ] [ ] B = new int [ 3 ] [ C + 1 ] ;
  int ans = Integer . MAX_VALUE ;
  for ( int i = 1 ;
  i <= C ;
  i ++ ) for ( int j = 1 ;
  j <= C ;
  j ++ ) D [ i ] [ j ] = sc . nextInt ( ) ;
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    for ( int j = 1 ;
    j <= N ;
    j ++ ) {
      int r = ( i + j ) % 3 ;
      int cij = sc . nextInt ( ) ;
      A [ r ] [ cij ] ++ ;
    }
  }
  for ( int i = 0 ;
  i < 3 ;
  i ++ ) {
    for ( int j = 1 ;
    j <= C ;
    j ++ ) {
      for ( int k = 1 ;
      k <= C ;
      k ++ ) {
        B [ i ] [ j ] += D [ k ] [ j ] * A [ i ] [ k ] ;
      }
    }
  }
  for ( int i = 1 ;
  i <= C ;
  i ++ ) {
    for ( int j = 1 ;
    j <= C ;
    j ++ ) {
      for ( int k = 1 ;
      k <= C ;
      k ++ ) {
        if ( i != j && i != k && j != k ) {
          ans = Math . min ( ans , B [ 0 ] [ i ] + B [ 1 ] [ j ] + B [ 2 ] [ k ] ) ;
        }
      }
    }
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; final int C = sc . nextInt ( ) ; int [ ] [ ] A = new int [ 3 ] [ C + 1 ] ; int [ ] [ ] D = new int [ C + 1 ] [ C + 1 ] ; int [ ] [ ] B = new int [ 3 ] [ C + 1 ] ; int ans = Integer . MAX_VALUE ; for ( int i = 1 ; i <= C ; i ++ ) for ( int j = 1 ; j <= C ; j ++ ) D [ i ] [ j ] = sc . nextInt ( ) ; for ( int i = 1 ; i <= N ; i ++ ) { for ( int j = 1 ; j <= N ; j ++ ) { int r = ( i + j ) % 3 ; int cij = sc . nextInt ( ) ; A [ r ] [ cij ] ++ ; } } for ( int i = 0 ; i < 3 ; i ++ ) { for ( int j = 1 ; j <= C ; j ++ ) { for ( int k = 1 ; k <= C ; k ++ ) { B [ i ] [ j ] += D [ k ] [ j ] * A [ i ] [ k ] ; } } } for ( int i = 1 ; i <= C ; i ++ ) { for ( int j = 1 ; j <= C ; j ++ ) { for ( int k = 1 ; k <= C ; k ++ ) { if ( i != j && i != k && j != k ) { ans = Math . min ( ans , B [ 0 ] [ i ] + B [ 1 ] [ j ] + B [ 2 ] [ k ] ) ; } } } } System . out . println ( ans ) ; }
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