//Queue

#include <fstream>

using namespace std;

ifstream fin("queue.in");
ofstream fout("queue.out");

#define NMAX 30000

unsigned N, WR, i, X;
unsigned top1, S1[NMAX+5];
unsigned top2, S2[NMAX+5];
char operatie[18];

void getNumber();
void push1();
void pop1();
void push2();
void pop2();

int main()
{
    fin>>N;
    top1 = top2 = 0;

    for(i = 1 ; i <= N ; i++) {

        fin>>operatie; //citim operatia
        fout<<i<<":"; //afisam indicele operatiei din input

        if(operatie[1] == 'u') { //push_back(X)

            getNumber(); //functia stocheaza valoarea de introdus in variabila globala X
            push1();
            fout<<" read("<<X<<") push(1,"<<X<<")";

            fout<<'\n';
        }
        else { //operatie[1] == 'o', adica pop_front()

            if(top1 > 0) {
                if(top2 == 0) {
                    while(top1 > 1) {
                        pop1(); fout<<" pop(1)";
                        X = WR;
                        push2(); fout<<" push(2,"<<WR<<")";
                    }

                    pop1(); fout<<" pop(1) write("<<WR<<")";
                }
                else {
                    pop2(); fout<<" pop(2) write("<<WR<<")";
                }
            }
            else {
                pop2(); fout<<" pop(2) write("<<WR<<")";
            }

            fout<<'\n';
        }
    }

    fin.close();
    fout.close();

    return 0;
}

void getNumber() {
    unsigned i;
    X = 0;
    for(i = 10 ; operatie[i] != ')' ; i++)
        X = X*10 + (unsigned)(operatie[i]-'0');
}

void push1() {
    if(top1 < NMAX)
        S1[++top1] = X;
}

void pop1() {
    if(top1 > 0)
        WR = S1[top1--];
}

void push2() {
    if(top2 < NMAX)
        S2[++top2] = X;
}

void pop2() {
    if(top2 > 0)
        WR = S2[top2--];
}