T, A, B = map(int, raw_input().split())

ans = [""] * T
if A > T or B > T:
        print "NO"
else:
        for i in xrange(T):
                if (A == 0 and i != T - 1) or A < 0:
                        ans[i] += "v"
                        A += 1
                elif A > 0:
                        ans[i] += "^"
                        A -= 1
        for i in xrange(T - 1, -1, -1):
                if (B == 0 and i != 0) or B < 0:
                        ans[i] += "<"
                        B += 1
                elif B > 0:
                        ans[i] += ">"
                        B -= 1

        if "" not in ans:
                print "YES"
                for a in ans:
                        print a
        else:
                print "NO"