public static void main ( String [ ] args ) {
  int t , n , m , ans ;
  Scanner sc = new Scanner ( System . in ) ;
  t = sc . nextInt ( ) ;
  while ( t -- > 0 ) {
    n = sc . nextInt ( ) ;
    m = sc . nextInt ( ) ;
    int a [ ] = new int [ n ] ;
    int b [ ] = new int [ m ] ;
    ans = 0 ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      a [ i ] = sc . nextInt ( ) ;
    }
    for ( int i = 0 ;
    i < m ;
    i ++ ) {
      b [ i ] = sc . nextInt ( ) ;
    }
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      for ( int j = 0 ;
      j < m ;
      j ++ ) {
        if ( a [ i ] == b [ j ] ) {
          ans ++ ;
        }
      }
    }
    System . out . println ( ans ) ;
  };
}

public static void main ( String [ ] args ) { int t , n , m , ans ; Scanner sc = new Scanner ( System . in ) ; t = sc . nextInt ( ) ; while ( t -- > 0 ) { n = sc . nextInt ( ) ; m = sc . nextInt ( ) ; int a [ ] = new int [ n ] ; int b [ ] = new int [ m ] ; ans = 0 ; for ( int i = 0 ; i < n ; i ++ ) { a [ i ] = sc . nextInt ( ) ; } for ( int i = 0 ; i < m ; i ++ ) { b [ i ] = sc . nextInt ( ) ; } for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < m ; j ++ ) { if ( a [ i ] == b [ j ] ) { ans ++ ; } } } System . out . println ( ans ) ; } ; }
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