#include<iostream>
#include<cstdio>
#include<vector>
#include<set>
#include<map>
#include<stack>
#include<queue>
using namespace std;
int main()
{
queue <int> q;
q.push(9);
q.push(8);
q.push(7);
while(!q.empty()){
cout<<q.front()<<endl;
q.pop();
}
return 0;
}