public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  int C = sc . nextInt ( ) ;
  int [ ] [ ] D = new int [ C ] [ C ] ;
  int [ ] [ ] c = new int [ N ] [ N ] ;
  for ( int i = 0 ;
  i < C ;
  i ++ ) {
    for ( int j = 0 ;
    j < C ;
    j ++ ) {
      D [ i ] [ j ] = sc . nextInt ( ) ;
    }
  }
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    for ( int j = 0 ;
    j < N ;
    j ++ ) {
      c [ i ] [ j ] = sc . nextInt ( ) - 1 ;
    }
  }
  sc . close ( ) ;
  int [ ] [ ] g = new int [ C ] [ 3 ] ;
  for ( int i = 0 ;
  i < C ;
  i ++ ) {
    for ( int j = 0 ;
    j < N ;
    j ++ ) {
      for ( int k = 0 ;
      k < N ;
      k ++ ) {
        if ( c [ j ] [ k ] != i ) {
          g [ i ] [ ( j + k ) % 3 ] += D [ c [ j ] [ k ] ] [ i ] ;
        }
      }
    }
  }
  int min = Integer . MAX_VALUE ;
  for ( int i = 0 ;
  i < C ;
  i ++ ) {
    for ( int j = 0 ;
    j < C ;
    j ++ ) {
      for ( int k = 0 ;
      k < C ;
      k ++ ) {
        if ( i == j || i == k || j == k ) continue ;
        min = Math . min ( min , g [ i ] [ 0 ] + g [ j ] [ 1 ] + g [ k ] [ 2 ] ) ;
      }
    }
  }
  System . out . println ( min ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; int C = sc . nextInt ( ) ; int [ ] [ ] D = new int [ C ] [ C ] ; int [ ] [ ] c = new int [ N ] [ N ] ; for ( int i = 0 ; i < C ; i ++ ) { for ( int j = 0 ; j < C ; j ++ ) { D [ i ] [ j ] = sc . nextInt ( ) ; } } for ( int i = 0 ; i < N ; i ++ ) { for ( int j = 0 ; j < N ; j ++ ) { c [ i ] [ j ] = sc . nextInt ( ) - 1 ; } } sc . close ( ) ; int [ ] [ ] g = new int [ C ] [ 3 ] ; for ( int i = 0 ; i < C ; i ++ ) { for ( int j = 0 ; j < N ; j ++ ) { for ( int k = 0 ; k < N ; k ++ ) { if ( c [ j ] [ k ] != i ) { g [ i ] [ ( j + k ) % 3 ] += D [ c [ j ] [ k ] ] [ i ] ; } } } } int min = Integer . MAX_VALUE ; for ( int i = 0 ; i < C ; i ++ ) { for ( int j = 0 ; j < C ; j ++ ) { for ( int k = 0 ; k < C ; k ++ ) { if ( i == j || i == k || j == k ) continue ; min = Math . min ( min , g [ i ] [ 0 ] + g [ j ] [ 1 ] + g [ k ] [ 2 ] ) ; } } } System . out . println ( min ) ; }
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