#include <iostream>
#include <sstream>

using namespace std;

int main()
{
	string line;
	while(getline(cin,line))
	{
		int input,sum=0;
		istringstream cin(line);
		while(cin>>input)
		{
			sum+=input;
		}
		cout<<sum<<endl;
	}

	 return 0;
}