public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  int t = sc . nextInt ( ) ;
  for ( int z = 1 ;
  z <= t ;
  z ++ ) {
    int n = sc . nextInt ( ) ;
    int m = sc . nextInt ( ) ;
    int [ ] b = new int [ n ] ;
    int [ ] l = new int [ m ] ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) b [ i ] = sc . nextInt ( ) ;
    for ( int i = 0 ;
    i < m ;
    i ++ ) l [ i ] = sc . nextInt ( ) ;
    int count = 0 ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      if ( Arrays . binarySearch ( l , b [ i ] ) >= 0 ) count ++ ;
    }
    System . out . println ( count ) ;
  }
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; int t = sc . nextInt ( ) ; for ( int z = 1 ; z <= t ; z ++ ) { int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; int [ ] b = new int [ n ] ; int [ ] l = new int [ m ] ; for ( int i = 0 ; i < n ; i ++ ) b [ i ] = sc . nextInt ( ) ; for ( int i = 0 ; i < m ; i ++ ) l [ i ] = sc . nextInt ( ) ; int count = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( Arrays . binarySearch ( l , b [ i ] ) >= 0 ) count ++ ; } System . out . println ( count ) ; } }
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