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

main()
{
  const char *s1;
  const char *s2 = "Wilma";
  const char *s3;

  string st1;
  string st2;

  st1 = s2;
  st2 = st1;
  st1[2] = 'Y';
  st2[1] = 'X';

  s1 = st1.c_str();
  s3 = s1+1;

  cout << "s1: " << s1 << endl;
  cout << "s2: " << s2 << endl;
  cout << "s3: " << s3 << endl;
  cout << "st1: " << st1 << endl;
  cout << "st2: " << st2 << endl;
}