dh = {1:"^", -1:"v"}
dv = {1:">", -1:"<"}
T, A, B = map(int,raw_input().split(" "))
absA = abs(A)
absB = abs(B)
slant = min(absA,absB)
short = slant + abs(absA-absB)
if short > T:
	print "NO"
else:
	print "YES"
	hor = A / absA
	ver = B / absB
	if short == slant:
		for i in range(slant-1):
			print dh[hor]+dv[ver]
		for i in range((T - short) % 2):
			print "^"
			print "v"
		if (T - short) % 2 == 0: 
			print dh[hor]+dv[ver]
		else:
			print dh[hor]
			print dv[ver]
	else:
		for i in range(slant):
			print dh[hor]+dv[ver]
		if absA > absB:
			for i in range(short-slant-1):
				print dh[hor]
		else:
			for i in range(short-slant-1):
				print dh[ver]
		for i in range((T - short) % 2):
			print "^"
			print "v"
		if (T - short) % 2 == 0:
			print dh[hor] if absA > absB else dh[ver]
		else:
			if absA > absB:
				print dh[ver]
				print dh[hor]+dh[ver*(-1)]
			else:
				print dh[hor]
				print dh[ver]+dh[hor*(-1)]