N = int(input())
A = list(input().split())
B = list(input().split())

X = [0]*5
AB = []
MOD = 998244353
for i in range(N):
    if len(B[i]) >= 2:
        flag = False
        for j in range(len(B[i])):
            if B[i][j] == "X":
                flag = True
        if flag:
            continue
    if B[i] == "X":
        X[int(A[i])] += 1
    else:
        AB.append((int(A[i]), int(B[i])))

dp = [[[[0]*34 for _ in range(5)] for _ in range(9)] for _ in range(len(AB)+1)]
dp[0][0][0][0] = 1
for i in range(len(AB)):
    A, B = AB[i]
    for j in range(9):
        for k in range(5):
            for l in range(34):
                if dp[i][j][k][l] != 0:
                    dp[i+1][j][k][l] += dp[i][j][k][l]
                    dp[i+1][j][k][l] %= MOD
                    if j < 8 and k+A <= 4 and l+B <= 33:
                        dp[i+1][j+1][k+A][l+B] += dp[i][j][k][l]
                        dp[i+1][j+1][k+A][l+B] %= MOD

ans = 0
for i in range(5):
    ans += dp[-1][-1][i][-1]*X[4-i]
    ans %= MOD

print(ans)