n = map(int,raw_input().split())
ni,mx,mn = [n[0],max(n[1],n[2]),min(n[1],n[2])]
s = ""
if ni >= mx:
	s = "\n^>" * mn + ("\n^" * (mx - mn) if n[1] > n[2] else "\n>" * (mx - mn)) + "\n>\n<" * ((ni - mx) / 2)
	if (ni - mx) % 2 == 1:
		if "\n^>" in s:
			s = s.replace("\n^>","\n^\n>",1)
		elif "\n>" in s:
			s = s.replace("\n>","\n^\nv>",1)	
		elif "\n^" in s:
			s = s.replace("\n^","\n>\n^<",1)
	print "YES"+s
else:
	print "NO"