#include <bits/stdc++.h>
using namespace std;
const int64_t infll = 9223372036854775807LL;
void solve() {
  int64_t ax, ay, bx, by, cx, cy;
  cin >> ax >> ay >> bx >> by >> cx >> cy;
  int64_t absquared = (bx - ax) * (bx - ax) + (by - ay) * (by - ay);
  int64_t bcsquared = (cx - bx) * (cx - bx) + (cy - by) * (cy - by);
  int64_t areatimes2 =
      abs(ax * by + bx * cy + cx * ay - ay * bx - by * cx - cy * ax);
  if (absquared == bcsquared && areatimes2 > 0)
    cout << "Yes\n";
  else
    cout << "No\n";
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  cout << fixed << setprecision(15);
  solve();
  return 0;
}
