mod = 998244353

def comb(x, y):
	ans = 1
	for i in range(1, y + 1):
		ans = ans * (x + 1 - i) * pow(i, -1, mod) % mod
	return ans

H, W, M = map(int, input().split())
print(comb(H + W - 2, H - 1) * comb(M, H + W - 1) * pow(M, (H - 1) * (W - 1), mod) % mod)