#include<iostream>
#include<cmath>
using namespace std;
long long  ax, ay, bx, by, cx, cy;
int main(){
    cin >> ax >> ay >> bx >> by >> cx >> cy;
    if (((ax-bx)*(ax-bx) + (ay-by)*(ay-by) - (cx-bx)*(cx-bx) - (cy-by)*(cy-by) == 0) && ((ax-bx)*(by-cy) != (bx-cx)*(ay-by))) cout << "Yes";
    else cout << "No";
}