PARALLEL (PreDH 2021)

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
#define task "parallel"

using namespace std;
using ld = long double;
using ll = long long;

const int N = 1e5 + 5;

int a[15];
vector<int> b;

void Read(){
    for(int i = 1; i <= 12; ++i)
        a[i] = 0;

    for(int i = 1; i <= 12; ++i)
        cin >> a[i];

    b.reserve(12);
}

bool Check() {
    for(int i = 0; i < b.size(); i += 2)
        if(b[i] != b[i + 1]) return false;

    return true;
}

bool Solve(){
    sort(a + 1, a + 12 + 1);
    if(a[1] == a[12] && a[1] == 0) return 0;

    cout << ((a[1] == a[4] && a[5] == a[8] && a[9] == a[12]) ? "yes\n" : "no\n");
    return true;
}

int32_t main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    if(fopen(task".INP", "r")){
        freopen(task".INP", "r", stdin);
        freopen(task".OUT", "w", stdout);
    }

    while(1){
        Read();
        if(!Solve()) return 0;
    }
}