N = int(input())
S = list(input())
dp = [[0] * 3 for _ in range(N)]
mod = 998244353
for i in range(N):
    s = S[i]
    if ord("0") <= ord(s) <= ord("9"):
        s = int(s)
        for j in range(3):
            dp[i][(j + s) % 3] += dp[i-1][j]
            dp[i][(j + s) % 3] %= mod
        dp[i][s % 3] += 1
        dp[i][s % 3] %= mod
    else:
        for j in range(3):
            for k in range(10):
                dp[i][(j + k) % 3] += dp[i-1][j]
                dp[i][(j + k) % 3] %= mod
        for k in range(10):
            dp[i][k % 3] += 1
            dp[i][k % 3] %= mod

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

print(ans)