#include <iostream>
#include <cmath>
using namespace std;
int main() {
int A,B,C, D, E, F;
cin >> A >> B >> C >> D >> E >> F;
if(A+B+C == D+E+F){
cout << "YES";
}else if(A+B+C != D+E+F){
cout << "NO";
}else{
}
return 0;
}
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