import java.util.*;
class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		int a = sc.nextInt();
		int b = sc.nextInt();
		
		int nowa = 0;
		int nowb = 0;
		
		
		int i;
		ArrayList<String> list = new ArrayList<String>();
		
		for(i = 0; i < t-1; i++) {
			if(nowa == a-1 && nowb == b-1) break;
			StringBuilder sb = new StringBuilder();
			if(nowa < a-1) {
				nowa++;
				sb.append("^");
			}
			if(nowb < b-1) {
				nowb++;
				sb.append(">");
			}
			list.add(sb.toString());
		}
		if(nowa != a-1 || nowb != b-1) {
			System.out.println("NO");
			return;
		}
		System.out.println("YES");
		for(int j = 0; j < list.size(); j++) {
			System.out.println(list.get(j));
		}
		if(i == t-1) {
			System.out.println("^>");
			return;
		}
		i++;
		nowa++;
		System.out.println("^");
		for(; i < t-1; i++) {
			if(nowa == a) {
				System.out.println("v>");
				nowa = a-1;
			}
			else {
				System.out.println("^<");
				nowa = a;
			}
		}
		if(nowa == a) {
			System.out.println(">");
		}
		else {
			System.out.println("^");
		}
		
		
		
		
		
		
		
		
		
	}
}