public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n , m , p , q , r ;
  n = sc . nextInt ( ) ;
  m = sc . nextInt ( ) ;
  p = sc . nextInt ( ) ;
  q = sc . nextInt ( ) ;
  r = sc . nextInt ( ) ;
  int [ ] [ ] mat = new int [ n ] [ m ] ;
  for ( int i = 0 ;
  i < r ;
  ++ i ) {
    int x , y , z ;
    x = sc . nextInt ( ) ;
    y = sc . nextInt ( ) ;
    z = sc . nextInt ( ) ;
    -- x ;
    -- y ;
    mat [ x ] [ y ] = z ;
  }
  int ans = 0 ;
  for ( int s = 0 ;
  s < 1 << n ;
  ++ s ) {
    if ( Integer . bitCount ( s ) != p ) continue ;
    int [ ] a = new int [ m ] ;
    for ( int i = 0 ;
    i < m ;
    ++ i ) {
      for ( int j = 0 ;
      j < n ;
      ++ j ) {
        if ( ( ( s >> j ) & 1 ) > 0 ) {
          a [ i ] += mat [ j ] [ i ] ;
        }
      }
    }
    Arrays . sort ( a ) ;
    int tmp = 0 ;
    for ( int i = 0 ;
    i < q ;
    ++ i ) {
      tmp += a [ a . length - 1 - i ] ;
    }
    ans = Math . max ( ans , tmp ) ;
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n , m , p , q , r ; n = sc . nextInt ( ) ; m = sc . nextInt ( ) ; p = sc . nextInt ( ) ; q = sc . nextInt ( ) ; r = sc . nextInt ( ) ; int [ ] [ ] mat = new int [ n ] [ m ] ; for ( int i = 0 ; i < r ; ++ i ) { int x , y , z ; x = sc . nextInt ( ) ; y = sc . nextInt ( ) ; z = sc . nextInt ( ) ; -- x ; -- y ; mat [ x ] [ y ] = z ; } int ans = 0 ; for ( int s = 0 ; s < 1 << n ; ++ s ) { if ( Integer . bitCount ( s ) != p ) continue ; int [ ] a = new int [ m ] ; for ( int i = 0 ; i < m ; ++ i ) { for ( int j = 0 ; j < n ; ++ j ) { if ( ( ( s >> j ) & 1 ) > 0 ) { a [ i ] += mat [ j ] [ i ] ; } } } Arrays . sort ( a ) ; int tmp = 0 ; for ( int i = 0 ; i < q ; ++ i ) { tmp += a [ a . length - 1 - i ] ; } ans = Math . max ( ans , tmp ) ; } System . out . println ( ans ) ; }
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