#include <bits/stdc++.h>
using namespace std;

int xa,xb,xc,ya,yb,yc,ab,ac,bc;

int main () {
	scanf("%d%d%d%d%d%d",&xa,&ya,&xb,&yb,&xc,&yc);
	ab = pow(xb - xa,2) + pow(yb - ya,2);
	ac = pow(xc - xa,2) + pow(yc - ya,2);
	bc = pow(xc - xb,2) + pow(yc - yb,2);
	if (ab + ac == bc || ab + bc == ac || bc + ac == ab) printf("Yes");
	else printf("No");
	return 0;
}