def f(t, x, lr):
    assert t >= x
    d, m = divmod(t-x, 2)
    res = []
    res.append(' ' * m)
    res.append(lr[0] * (x + d))
    res.append(lr[1] * d)

    return ''.join(res)


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

if T < A or T < B:
    print('NO')
    exit(0)

s = f(T, A, '^v')
t = reversed(f(T, B, '><'))

ans = []
for a, b in zip(s, t):
    if a == b == ' ':
        print('NO')
        break

    ans.append((a + b).strip())
else:
    print('YES')
    print(*ans, sep='\n')