public static void main ( String [ ] args ) {
  Scanner s = new Scanner ( System . in ) ;
  int n = s . nextInt ( ) ;
  int m = s . nextInt ( ) ;
  s . nextLine ( ) ;
  String input = s . nextLine ( ) ;
  String result = "" , result1 = "" ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    int l = s . nextInt ( ) ;
    int r = s . nextInt ( ) ;
    l = l - 1 ;
    r = r - 1 ;
    result = "" ;
    char c1 = s . next ( ) . charAt ( 0 ) ;
    char c2 = s . next ( ) . charAt ( 0 ) ;
    for ( int y = 0 ;
    y < input . length ( ) ;
    y ++ ) {
      if ( y >= l && y <= r ) {
        if ( input . charAt ( y ) == c1 ) {
          result = result + c2 ;
        }
        else result = result + input . charAt ( y ) ;
      }
      else result = result + input . charAt ( y ) ;
    }
    input = result ;
  }
  System . out . println ( result ) ;
}

public static void main ( String [ ] args ) { Scanner s = new Scanner ( System . in ) ; int n = s . nextInt ( ) ; int m = s . nextInt ( ) ; s . nextLine ( ) ; String input = s . nextLine ( ) ; String result = " " , result1 = " " ; for ( int i = 0 ; i < m ; i ++ ) { int l = s . nextInt ( ) ; int r = s . nextInt ( ) ; l = l - 1 ; r = r - 1 ; result = " " ; char c1 = s . next ( ) . charAt ( 0 ) ; char c2 = s . next ( ) . charAt ( 0 ) ; for ( int y = 0 ; y < input . length ( ) ; y ++ ) { if ( y >= l && y <= r ) { if ( input . charAt ( y ) == c1 ) { result = result + c2 ; } else result = result + input . charAt ( y ) ; } else result = result + input . charAt ( y ) ; } input = result ; } System . out . println ( result ) ; }
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