package main

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

var sc = bufio.NewScanner(os.Stdin)

func Scanner() string {
	sc.Scan()
	return sc.Text()
}
func main() {
	buf := make([]byte, 0)
	sc.Buffer(buf, 100000007)
	sc.Split(bufio.ScanWords)
	n, _ := strconv.Atoi(Scanner())
	m, _ := strconv.Atoi(Scanner())
	k, _ := strconv.Atoi(Scanner())
	mark := Scanner()
	ver := make([]int, n)
	side := make([]int, m)
	for i := 0; i < m; i++ {
		side[i], _ = strconv.Atoi(Scanner())
	}
	for i := 0; i < n; i++ {
		ver[i], _ = strconv.Atoi(Scanner())
	}
	ans := 0

	for i := 0; i < n; i++ {
		for j := 0; j < m; j++ {
			if mark == "+" {
				ans += side[j] + ver[i]
			} else {
				ans += side[j] * ver[i]
			}
		}
	}
	fmt.Println(ans % k)
}