#include <bits/stdc++.h>

using namespace std;

#define ll long long
inline int dcmp(ll a) {
  return a < 0 ? -1 : (a > 0 ? 1 : 0);
}
inline ll Abs(ll a) {
  return a * dcmp(a);
}
struct Dis {
  ll x, y;
  Dis(ll X = 0, ll Y = 0) { x = X, y = Y; }
};

ll operator *(Dis x, Dis y) {
  return x.x * y.y - x.y * y.x;
}

Dis operator -(Dis x, Dis y) {
  return {x.x - y.x, x.y - y.y};
}

struct Len {
  Dis x, y;
};

ll operator *(Len x, Len y) {
  return (x.y - x.x) * (y.y - y.x);
}

bool ck(ll x, ll y) {
  return dcmp(x) * dcmp(y) >= 0;
}

bool X(Len x, Len y) {
  return ck((y.y - x.x) * (x.y - x.x), (x.y - x.x) * (y.x - x.x)) && ck((x.x - y.x) * (y.y - y.x), (y.y - y.x) * (x.y - y.x));
}

bool sov(Len x, Len y, Dis z) {
  return  ck((y.x - x.x) * (z - x.x), (x.y - y.y) * (z - y.y));
}

bool clc(Len x, Len y, Len z) {
  if (X(x, y)) {
    return 1;
  }
  if (sov(x, y, z.x) || sov(x, y, z.y)) {
    return 1;
  }
  swap(x.x, x.y);
  return sov(x, y, z.x) || sov(x, y, z.y);
}

bool pr(Len x, Len y, Len z) {
  return clc(x, y, z) || clc(y, z, x) || clc(z, x, y);
}

ll a1, b1, Y1, a2, b2, Y2, a3, b3, Y3;

int main() {
# ifndef ONLINE_JUDGE
  freopen("in.txt", "r", stdin);
# endif
  ios::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);
  while (cin >> a1 >> b1 >> Y1 >> a2 >> b2 >> Y2 >> a3 >> b3 >> Y3) {
    cout << (pr({{a1, Y1}, {b1, Y1}}, {{a2, Y2}, {b2, Y2}}, {{a3, Y3}, {b3, Y3}}) ? "Yes\n" : "No\n");
  }
}