#include<iostream>
using namespace std;
struct queue {
	int data[100];
	int head;
	int tail;
};

int main() {
	struct queue q;
	int i;
	q.head=1;
	q.tail=1;
	for(i=1; i<=9; i++) {
		cin>>q.data[q.tail];
		q.tail++;
	}
	while(q.head<q.tail) {
		cout<<q.data[q.head];
		q.head++;
		q.data[q.tail]=q.data[q.head];
		q.tail++;
		q.head++;
	}
	return 0;
}