package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func nextInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return i
}
func get(n int) []int {
	inputs :=
		make([]int, n)
	for index := range inputs {
		inputs[index] = nextInt()
	}
	return inputs
}

//
// func getInput() (int, int) {
// 	var a, b int
// 	fmt.Scan(&a)
// 	fmt.Scan(&b)
// 	return a, b
// }

type Road struct {
	cost     int
	timecost int
}

func getAnswer() int8 {
	return -1
}
func getRoads(n int, s []int, t []int, y []int, m []int) [][]Road {
	r := make([][]Road, n)
	for i := 0; i < n; i++ {
		r[i] = make([]Road, n)
	}
	for i := range s {
		r[s[i]-1][t[i]-1] = Road{y[i], m[i]}
	}
	return r
}
func main() {
	sc.Split(bufio.ScanWords)
	n, c, v := nextInt(), nextInt(), nextInt()
	s, t, y, m := get(v), get(v), get(v), get(v)
	roads := getRoads(n, s, t, y, m)
	var position, total, time int
	for i := 0; i < n; i++ {
		var r *Road
		// fmt.Println("pos", position)
		for to, road := range roads[position] {
			// fmt.Println("to", to, "road", road)
			if road.cost == 0 {
				continue
			}
			if (r == nil || r.timecost > road.timecost) && total+road.cost <= c {
				// fmt.Println("found")
				r = &roads[position][to]
				position = to
			}
		}
		// fmt.Println(r)
		total += r.cost
		time += r.timecost
		if position == n-1 {
			break
		}
	}
	// fmt.Println(total)
	// fmt.Println(time)
	if c >= total && position == n-1 {
		fmt.Println(time)
	} else {
		fmt.Println(-1)
	}

}