#include <bits/stdc++.h>
using namespace std;
int main(){
    char ii;
    long long int i,o;
    cin>>i>>ii>>o>>ii;
    cout<<i+o;
    return 0;
}
/**************************************************************
	Problem: 1130
	User: wengsihan
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/