public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  int t = input . nextInt ( ) ;
  for ( int j = 0 ;
  j < t ;
  j ++ ) {
    int px = input . nextInt ( ) ;
    int py = input . nextInt ( ) ;
    String s = input . next ( ) ;
    char x = 'L' ;
    char y = 'D' ;
    if ( px > 0 ) {
      x = 'R' ;
    }
    if ( py > 0 ) {
      y = 'U' ;
    }
    int count_x = 0 ;
    int count_y = 0 ;
    for ( int i = 0 ;
    i < s . length ( ) ;
    i ++ ) {
      if ( s . charAt ( i ) == x ) {
        count_x ++ ;
      }
      else if ( s . charAt ( i ) == y ) {
        count_y ++ ;
      }
    }
    if ( count_x >= Math . abs ( px ) && count_y >= Math . abs ( py ) ) {
      System . out . println ( "YES" ) ;
    }
    else {
      System . out . println ( "NO" ) ;
    }
  }
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; int t = input . nextInt ( ) ; for ( int j = 0 ; j < t ; j ++ ) { int px = input . nextInt ( ) ; int py = input . nextInt ( ) ; String s = input . next ( ) ; char x = ' L ' ; char y = ' D ' ; if ( px > 0 ) { x = ' R ' ; } if ( py > 0 ) { y = ' U ' ; } int count_x = 0 ; int count_y = 0 ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { if ( s . charAt ( i ) == x ) { count_x ++ ; } else if ( s . charAt ( i ) == y ) { count_y ++ ; } } if ( count_x >= Math . abs ( px ) && count_y >= Math . abs ( py ) ) { System . out . println ( " YES " ) ; } else { System . out . println ( " NO " ) ; } } }
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