mod = 998244353 N,M,k = map(int,input().split()) dp = [0 for i in range(3*N + 1)] dp[0] = 1 for n in range(2*N): for c in range(1,7): dp[min(2*N,n+c)] += dp[n] dp[min(2*N,n+c)] %= mod C = list(map(int,input().split())) for c in C: a = dp[c] r = 0 for i in range(-6,0): j = 7 + i r += j * dp[2*N+i-c] % mod a = a * r % mod c += N b = dp[c] r = 0 for i in range(-6,0): j = 7 + i r += j * dp[2*N+i-c] % mod b = b * r % mod c = dp[c-N] * dp[N] % mod c = c * r % mod print((a + b - c) % mod)