import sys
input = sys.stdin.readline

N = int(input())
S = input()[:-1]
dp = [[0]*3 for _ in range(2)]
dp[0][0] = 1
ans = 0
MOD = 998244353

for Si in S:
    ndp = [[0]*3 for _ in range(2)]
    
    for i in range(3):
        ndp[0][i] = dp[0][i]
    
    if Si=='?':
        nums = list(range(10))
    else:
        nums = [int(Si)]
    
    for i in range(2):
        for j in range(3):
            for num in nums:
                nj = (j+num)%3
                ndp[1][nj] += dp[i][j]
                ndp[1][nj] %= MOD
    
    dp = ndp
    ans += dp[1][0]
    ans %= MOD

print(ans)