T, A, B = map(int, raw_input().split())
if A > T or B > T:
    print('NO')
    quit()
vs = ['^'] * A + ['^', 'v'] * ((T - A) / 2)
if len(vs) < T:
    vs.append('')
hs = ['>'] * B + ['>', '<'] * ((T - B) / 2)
if len(hs) < T:
    hs.append('')
hs = list(reversed(hs))
ans = [vs[i] + hs[i] for i in range(len(hs))]
for m in ans:
    if m == '':
        print('NO')
        quit()
print('YES')
for m in ans:
    print(m)