MOD = 998_244_353


def main():
    N = int(input())
    A = list(input().split())
    B = list(input().split())

    # X があるやつとないやつを分けておきたい
    a = []
    b = []
    ax = []
    bx = []

    for i in range(N):
        if "X" in B[i]:
            ax.append(A[i])
            bx.append(B[i])
        else:
            a.append(A[i])
            b.append(B[i])

    dp = [[[0 for _ in range(10)] for __ in range(35)] for ___ in range(9)]
    dp[0][0][0] = 1

    L = len(a)

    for i in range(L):
        ac = int(a[i])
        bc = int(b[i])

        for j in range(7, -1, -1):
            for k in range(34, -1, -1):
                for l in range(9, -1, -1):
                    if k + bc <= 34 and l + ac <= 9:
                        dp[j + 1][k + bc][l + ac] += dp[j][k][l]
                        dp[j + 1][k + bc][l + ac] %= MOD

    L = len(ax)
    ans = 0

    for i in range(L):
        ac = int(ax[i])

        bs = bx[i][:-1]

        if bs == '':
            if ac <= 4:
                ans += dp[8][33][4 - ac]
                ans %= MOD
        else:
            bc = int(bs)

            if 4 >= 33 - bc and 33 >= bc:
                ans += dp[8][33 - bc][4 - ac]
                ans %= MOD

    print(ans)


main()