#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: zhouhongyi
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/