package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	var n,k int
	Fscan(rd,&n,&k)
	m := make(map[string]int)
	for i := 0; i < n; i++ {
		var s string
		Fscan(rd,&s)
		m[s] = i%k
	}
	for i := 0; i < n; i++ {
		var t string
		Fscan(rd,&t)
		if m[t] != i%k {
			Println("No")
			return
		}
	}
	Println("Yes")
}