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

#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define rep3(i,m,n) for(int (i)=m;(i)<=(n);(i)++)
#define rep3rev(i,m,n) for(int (i)=m;(i)>=(n);(i)--)
#define all(a) (a.begin()),(a.end())
#define rall(a) (a.rbegin()),(a.rend())
#define fi first
#define se second
#define pb push_back
#define eb emplace_back

using ll = long long;
using vll = vector<ll>;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using P = pair<int, int>;

void Main(){
    int a, b, c, d, e, f; cin >> a >> b >> c >> d >> e >> f;
    multiset<int> X, Y;
    X.insert(a);
    X.insert(b);
    X.insert(c);
    Y.insert(d);
    Y.insert(e);
    Y.insert(f);
    if(X != Y) {
        cout << "No" << endl;
        return;
    }
    cout << "Yes" << endl;
    cout << 2 << endl;
    return;
}

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(15);
    Main();
    return 0;
}