#include <iostream>

using namespace std;
int rec(string s, int i) {
    if(i == -1) {
        return 0;
    }
    int cifra = 0;
    if(isdigit(s[i])) {
        cifra = (s[i] - '0');
        return rec(s, i - 1)  * 10 +  cifra;
    }
    else {
        return rec(s, i - 1);
    }
    
}
int main()
{
    string s;
    cin >> s;
    cout << rec(s, s.size() - 1) << endl;
    return 0;
}
/*
 rec(123abc45, 7) = rec(123abc45, 6) * 10 + 5 = 1234 * 10 + 5 = 12345
 rec(123abc45, 6) = rec(123abc45, 5) * 10 + 4 = 123 * 10 + 4 = 1234
 rec(123abc45, 5) = rec(123abc45, 4) = 123
 rec(123abc45, 4) = rec(123abc45, 3) = 123
 rec(123abc45, 3) = rec(123abc45, 2) = 123
 rec(123abc45, 2) = rec(123abc45, 1) * 10 + 3 = 12 * 10 + 3 = 123
 rec(123abc45, 1) = rec(123abc45, 0) * 10 + 2 = 1 * 10 + 2 = 12
 rec(123abc45, 0) = rec(123abc45, -1) * 10 + 1 = 0 * 10 + 1 = 1
 rec(123abc45, -1) = 0
 
 **/