public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  String s = sc . next ( ) ;
  char [ ] a = new char [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    a [ i ] = s . charAt ( i ) ;
  }
  int l , r ;
  char c1 , c2 ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    l = sc . nextInt ( ) ;
    r = sc . nextInt ( ) ;
    c1 = sc . next ( ) . charAt ( 0 ) ;
    c2 = sc . next ( ) . charAt ( 0 ) ;
    for ( int j = l - 1 ;
    j <= r - 1 ;
    j ++ ) {
      if ( a [ j ] == c1 ) {
        a [ j ] = c2 ;
      }
    }
  }
  for ( int j = 0 ;
  j < n ;
  j ++ ) {
    System . out . print ( a [ j ] ) ;
  }
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; String s = sc . next ( ) ; char [ ] a = new char [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { a [ i ] = s . charAt ( i ) ; } int l , r ; char c1 , c2 ; for ( int i = 0 ; i < m ; i ++ ) { l = sc . nextInt ( ) ; r = sc . nextInt ( ) ; c1 = sc . next ( ) . charAt ( 0 ) ; c2 = sc . next ( ) . charAt ( 0 ) ; for ( int j = l - 1 ; j <= r - 1 ; j ++ ) { if ( a [ j ] == c1 ) { a [ j ] = c2 ; } } } for ( int j = 0 ; j < n ; j ++ ) { System . out . print ( a [ j ] ) ; } }
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