#include <iostream>
using namespace std;
const int maxn = 2005;
const int max_weight = 3550;
const int INF = 1e9;
string s;
int dp[maxn];
int rec(int at) {
    if(at >= s.size()) {
        return 1;
    }
    if(dp[at] != -1) {
        return dp[at];
    }
    int result = 0;
    if(s[at] != '0') {
        result += rec(at + 1);
    }
    if(at + 1 < s.size() and s[at] != '0') {
        int tmp_number = (s[at] - '0') * 10 + (s[at + 1] - '0');
        if(tmp_number <= 26 and tmp_number != 0) {
            result += rec(at + 2);
        }
    }
    return dp[at] = result;
}

int main() {
    cin >> s;
    for(int i = 0; i < maxn; i++) {
        dp[i] = -1;
    }
    cout << rec(0) << endl;
    return 0;
}