mod = 998244353
N = int(input())
S = input()
dp = [[0 for _ in range(3)] for _ in range(N + 1)]
for i in range(N + 1):
    dp[i][0] = 1
ans = 0
for i in range(N):
    for j in range(3):
        for k in range(10):
            if S[i] == '?' or k == int(S[i]):
                dp[i + 1][(j + k) % 3] += dp[i][j]
                dp[i + 1][(j + k) % 3] %= mod
    ans += dp[i + 1][0] - 1
    ans %= mod
print(ans)