import sys
input = sys.stdin.readline

n=int(input())
A=input().split()
B=input().split()

ANS=0
mod=998244353

DP=[[[[0]*34 for i in range(5)] for j in range(10)] for k in range(2)]

DP[0][0][0][0]=1

for i in range(n):
    NDP=[[[[0]*34 for i in range(5)] for j in range(10)] for k in range(2)]

    for last in range(2):
        for j in range(10):
            for k in range(5):
                for l in range(34):
                    NDP[last][j][k][l]=DP[last][j][k][l]
        
    a=int(A[i])
    if "X" in B[i]:
        if B[i]=="X":
            b=0
        else:
            b=int(B[i][:-1])
        c=1
    else:
        b=int(B[i])
        c=0

    if c==1 and b!=0:
        continue

    #print(a,b,c,[DP[j][4][33] for j in range(10)])

    for last in range(2):
        for j in range(10):
            for k in range(5):
                for l in range(34):
                    if DP[last][j][k][l]==0:
                        continue
                    
                    if c==0:
                        if last==0:
                            if j+1<9 and k+a<=4 and l+b<=33:
                                NDP[last][j+1][k+a][l+b]=(NDP[last][j+1][k+a][l+b]+DP[last][j][k][l])%mod
                        else:
                            if j+1<=9 and k+a<=4 and l+b<=33:
                                NDP[last][j+1][k+a][l+b]=(NDP[last][j+1][k+a][l+b]+DP[last][j][k][l])%mod

                    else:
                        if last==0:
                            if j+1<=9 and k+a<=4 and l+b<=33:
                                NDP[1][j+1][k+a][l+b]=(NDP[1][j+1][k+a][l+b]+DP[last][j][k][l])%mod


    DP=NDP

print(DP[1][9][4][33])