#include<iostream>
#include <cstring>
using namespace std;
int main(){
    int a,b;
	char c,d;
	cin>>a>>c>>b>>d;
	cout<<a+b; 
    return 0;
}


/**************************************************************
	Problem: 1130
	User: xuanhua
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/