public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  sc . nextLine ( ) ;
  String s = sc . nextLine ( ) ;
  StringBuilder string = new StringBuilder ( s ) ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    int l = sc . nextInt ( ) ;
    int r = sc . nextInt ( ) ;
    char c1 = sc . next ( ) . charAt ( 0 ) ;
    char c2 = sc . next ( ) . charAt ( 0 ) ;
    sc . nextLine ( ) ;
    Character c3 = Character . valueOf ( c1 ) ;
    Character c4 = Character . valueOf ( c2 ) ;
    for ( int j = l - 1 ;
    j <= r - 1 ;
    j ++ ) {
      Character c5 = Character . valueOf ( string . charAt ( j ) ) ;
      boolean res = c3 . equals ( c5 ) ;
      if ( res == true ) string . setCharAt ( j , c2 ) ;
    }
  }
  System . out . println ( string ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; sc . nextLine ( ) ; String s = sc . nextLine ( ) ; StringBuilder string = new StringBuilder ( s ) ; for ( int i = 0 ; i < m ; i ++ ) { int l = sc . nextInt ( ) ; int r = sc . nextInt ( ) ; char c1 = sc . next ( ) . charAt ( 0 ) ; char c2 = sc . next ( ) . charAt ( 0 ) ; sc . nextLine ( ) ; Character c3 = Character . valueOf ( c1 ) ; Character c4 = Character . valueOf ( c2 ) ; for ( int j = l - 1 ; j <= r - 1 ; j ++ ) { Character c5 = Character . valueOf ( string . charAt ( j ) ) ; boolean res = c3 . equals ( c5 ) ; if ( res == true ) string . setCharAt ( j , c2 ) ; } } System . out . println ( string ) ; }
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