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

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

Y = ['^'] * A
Y.extend(['^', 'v'] * ((T - A) // 2))
if (T - A) % 2 == 1:
    cnt += 1
    Y.append('')

X = []
if (T - B) % 2 == 1:
    X.append('')
    cnt = 1
X.extend(['>'] * B)
X.extend(['>', '<'] * ((T - B) // 2))

if cnt >= T:
    print('NO')
    exit()
print('YES')
for t in range(T):
    print(Y[t] + X[t])