import java.util.*;
class A{
	static Scanner s = new Scanner(System.in);
	public static void main(String[] args) {
		int m=s.nextInt(),tx=s.nextInt(),ty=s.nextInt(),x=0,y=0;
		if((tx>m||ty>m)||(tx==0&&ty==0&&m==1)) {
			System.out.println("NO");
			return;
		}
		System.out.println("YES");
		for(int i=0; i<m; i++) {
			if((i==m-2)&&(x==tx||y==ty)) {
				if(x==tx) {
					System.out.print('<');
					--x;
				}else {
					System.out.print('v');
					--y;
				}
			}else {
				if(x==tx&&y==ty) {
					System.out.print('<');
					--x;
				}else {
					if(x<tx) {
						System.out.print('>');
						x++;
					}else if (x>tx) {
						System.out.print('<');
						--x;
					}
					if(y<ty) {
						System.out.print('^');
						y++;
					}else if (y>ty) {
						System.out.print('v');
						--y;
					}
				}
			}
			System.out.println();
		}
	}
}