#include <bits/stdc++.h>
#include <queue>
using namespace std;
int main()
{
    queue<string> ins;
    string str;
    getline(cin, str);
    char *token = strtok(&str[0], " ");
    while (token != NULL)
    {
        token = strtok(NULL, " ");
        ins.push(token);
    }
    while(!ins.empty()) {
    cout << "Popping ";
    cout << ins.front() << "\n";
    ins.pop();
    }
    return 0;
}