#include <set>
#include <iostream>
#include <string>
 
using namespace std;
 
int main()
{
  string mystring = "Hello World this is my string";
  string temp = "";
  set<string> myset;
 
  for (unsigned int i = 0; i < mystring.length(); i++)
  {
    if (mystring.at(i) == ' ')
    {
      myset.insert(temp);
      temp = "";
    }
    else
    {
      temp.push_back(mystring.at(i));
    }
  }
  myset.insert(temp);
 
  for (set<string>::iterator i = myset.begin(); i != myset.end(); i++)
  {
    cout << *i << endl;
  }
  return 0;
}
 

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