#include<iostream>
#include<cstring>
#include<sstream>
using namespace std;
int main()
{
int a, b;
stringstream ss;
string s;
cin >> a >> b;
ss << a + b;
ss>>s;
for(unsigned int i=0;i<s.length();i++)
{
cout << s[i];
if (!((s.length()-i-1) % 3) && i!=s.length()-1&&!(s[0]=='-'&&i==0))cout << ",";
}
return 0;
}
emm,明明是两天前写的,我咋就看不懂了呢?nice