G

#include <iostream>
#include <vector>
#include <utility>
#include <algorithm>
#include <string>
#include <cctype>
#include <stack>
using namespace std;

int main() {
    string n;
    cin >> n;
    int ans = 0;
    int count = 0;
    for (int i = 1; i < n.size(); i++) {
        char a, b;
        a = n[i - 1];
        b = n[i];
        if (isalpha(a) && isalpha(b)) { //isalpha() check if char isdigit() check if digit
            ans++;
            if (i == n.size() - 1) {
                ans++;
            }
        }
        else if (isalpha(a) && isdigit(b)) {
            count = b - '0';
            if (i == n.size() - 1) {
                ans += count;
            }
        }
        else if (isdigit(a) && isalpha(b)) {
            ans += count;
            count = 0;
            if (i == n.size() - 1) {
                ans++;
            }
        }
        else {
            count *= 10;
            count += (b - '0');
            if (i == n.size() - 1) {
                ans += count;
            }
        }
    }
    cout << ans;
    return 0;
}