#include <iostream>
#include <vector>
#include <cstring>
using namespace std;
typedef long long ll;
const int maxn = 200005;
const ll MOD = 1e9 + 7;
int n;
string s;

ll dp[maxn][8];
ll rec(int at, int remainder) {
    if(at == n and remainder == 0) {
        return 1;
    }
    if(at == n) {
        return 0;
    }

    if(dp[at][remainder] != -1) {
        return dp[at][remainder];
    }
    ll res = 0;
    res += rec(at + 1, remainder);
    res %= MOD;
    int new_remainder = (remainder * 10 + (s[at] - '0')) % 8;


    res += rec(at + 1, new_remainder);
    res %= MOD;
    dp[at][remainder] = res;
    return res;
}
int main() {
    ios_base::sync_with_stdio(false);
    cin >> n >> s;
    memset(dp, -1, sizeof dp);

    cout << rec(0, 0) - 1 << endl;
    return 0;
}