#include<iostream>
#include<cstring>
using namespace std;

int main() {
        char *firstName = "";
        char *lastName = "";
        char letter[1];
        int size = 2;
                while(cin.peek() != ' ')
                {
                        cin >> letter; //read next letter
                        cout << "1" << endl;
                        char* tempName =  new char[size]; //create space for extra char and null char
                        cout << "2" << endl;
                        strcpy(tempName, firstName); //copy all name and add letter + null char
                        cout << "3" << endl;
                        strcat(tempName, letter);
                        cout << "4" << endl;
                        firstName = tempName; //store new version
                        cout << "5" << endl;
                }
        size = 2;
                do
                {
                        cin >> letter; //read next letter
                        char* tempName = new char[size]; //create space for extra char and null char
                        strcpy(tempName, lastName); //copy all name and add letter + null char
                        strcat(tempName, letter);
                        strcat(tempName, '\0');
                        lastName = tempName; //store new version
                }while(cin.peek() != ' ');