import java.util.Scanner; public class main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int m = sc.nextInt(); for (int i=0; i<n; i++) { String s = sc.next(); if (s.indexOf("LOVE") > 0) { System.out.println("YES"); return; } } System.out.println("NO"); } }