t,a,b=map(int,raw_input().split())
m=max(a,b)
if m>t:
	print"NO"
	exit()
print"YES"
v,w=a-1,b-1
x=y=0
while x!=v or y!=w:
	s=""
	if x<v:
		s+=">"
		x+=1
	elif x>v:
		s+="<"
		x-=1
	if y<w:
		s+="^"
		y+=1
	elif y>w:
		s+="v"
		y-=1
	print s
	t-=1
while t>0:
	if t==1:
		print"^>"
		t-=1
	elif t==2:
		print">"
		print"^"
		t-=2
	else:
		print">"
		print"<"
		t-=2