#include <iostream.h>
#include<string>
using namespace std;
int main()
{
string str;
getline(cin,str);
cout << "The initial string is : ";
cout << str << endl;
str.push_back('s');
// Displaying string
cout << "The string after push_back operation is : ";
cout << str << endl;
str.pop_back();
cout << "The string after pop_back operation is : ";
cout << str << endl;
return 0;
}