#include<iostream>
#include <cstdio>
#include <string>
#include <cstring>
using namespace std;
template<typename K>
class Stack
{
public:
    int size;
    Stack(){
        this->first=NULL;
        this->size=0;
    };

    struct Structer
    {
        K value;
        Structer* next;
    };
    Structer* first;

    void Push(K value)
    {
        Structer* tr = new Structer;
        tr->value=value;
        tr->next = first;
        first = tr;
        size++;
    }
    void pop()
    {
        if(first!=NULL){
        Structer* tmp=first;
        first = first->next;
        free(tmp);
        size--;}
    }
    bool empty()
    {
        return (first == NULL) ? true : false;
    }
};
template<typename K>
void does(Stack<K> Str){
    freopen("input.txt", "r", stdin);
    char T;
    int N;
    cin>>T>>N;
    for(int i=0; i<N; i++){
        string P;
        cin>>P;
        int l=P.length();
        if(l==4){
            K value;
            cin>>value;
            cout<<value;
            Str.Push(value);
        }
        else
            Str.pop();
        }
    cout<<Str.size<<' ';
    K sum;
    while (Str.first!=NULL){
        sum+=Str.first->value;
        Str.first=Str.first->next;
    }
    cout<<sum;
}
void createStack(char T){
        if (T='I'){
            Stack<int>A;
            does(A);}
        else if (T='D'){
            Stack<double>A;
            does(A);}
        else if (T='S'){
            Stack<string>A;
            does(A);}
    };
int main(void){
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    char T;
    cin>>T;
    createStack(T);
}