#include <string>
#include <iostream>
using namespace std;

int main() {
    string str;
    bool is_zero = true;
    cin >> str;
    if (str[0] == '-') {
        cout << '-';
    }
    for (int i = str.size() - 1; i >= 0; --i) {
        if (str[i] != '0' && str[i] != ',') {
            is_zero = false;
        }
        if (!is_zero && str[i] != '-' && str[i] != ',') {
            cout << str[i];
        }
    }
    return 0;
}