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

if T < A or T < B or (T, A, B) == (1, 0, 0):
    route = None
else:
    routeY = ['^'] * (A + (T-A)/2) + ['v']  * ((T-A)/2)
    routeX = ['>'] * (B + (T-B)/2) + ['<']  * ((T-B)/2)
    if (T-A)%2 == 1:
        routeY.append('')
    if (T-B)%2 == 1:
        routeX.append('')

    route = [a+b for (a, b) in zip(routeX, routeY[::-1])]

if route:
    print 'YES'
    for item in route:
        print item
else:
    print 'NO'