#include <iostream>
#include <string>

using namespace std;
char inttochartable[54] = {'a','A','b','B','c','C','d','D','e','E','f','F','g','G','h','H','i','I','j','J','k','K','l','L','m','M','n','N','o','O','p','P','q','Q','r','R','s','S','t','T','u','U','v','V','w','W','x','X','y','Y','z','Z','/n',' '};
char int_to_char(int input) {
    if (input > 54) {
        return NULL;
    }
    return inttochartable[input];


};
int main()
{
    /*
    * Bark: Counter increment
    * Woof: Counter decrement
    * Growl: Print
    * Yip: Print raw number
    * Howl: Current +1
    * Wimper: Current -1
    */
    int counter[256] = {0};
    int current = 0;

    cout << "Hello, and welcome to bark!" << endl;
    while (true) {
    string input;
    cin >> input;
    if (input.compare("bark")==0) {
        counter[current]++;
    }
    if (input.compare("woof")==0) {
        counter[current]--;
    }
    if (input.compare("growl")==0) {
        cout << int_to_char(counter[current]);
        }
    if (input.compare("yip")==0) {
        cout << counter[current];
    }
    if (input.compare("howl")==0) {
        if (current < 256) {
            current++;
        };
    }
    if (input.compare("whimper")==0) {
        if (current != 0) {
            current--;
        };
    }
    }
    return 0;
};