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

short = min(A, B)

if T < A or T < B:
    route = None
elif (A, B) == (0, 0):
    if T == 1:
        route = None
    elif T%2 == 0:
        route = ['^'] * (T/2) + ['v'] * (T/2)
    else:
        route = ['^', '>', 'v<']
        route.extend(['^'] * ((T-3)/2))
        route.extend(['v'] * ((T-3)/2))
else:
    if short <= T:
        route = ['^>'] * short
        if A < B:
            route.extend(['^'] * (B-A))
        elif A > B:
            route.extend(['>'] * (A-B))

        restT = T - max(A, B)

        if restT == 1:
            del route[0]
            route.extend(['^', '>'])
        elif restT%2 == 0:
            route.extend(['^'] * (restT/2))
            route.extend(['v'] * (restT/2))
        else:
            route.extend(['^', '>', 'v<'])
            route.extend(['^'] * ((T-3)/2))
            route.extend(['v'] * ((T-3)/2))
    else:
        route = None

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