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

ans = 0
for i in range(1, N + 1):
    ans += dp[i][0]
    ans %= mod
print(ans)