???

#include <iostream>
#include <string>
#include <sstream>

using namespace std;

class TripleString{
private:
   string string1;
   string string2;
   string string3;

public:
   TripleString();
   TripleString(string str1, string str2, string str3);
   bool setString(string str1, string str2, string str3);
   bool validString(string str1, string str2, string str3);
   string getString();
   static const int MIN_LEN = 1;
   static const int MAX_LEN = 50;
};

static const string DEFAULT_STRING = "(undefine)";

int main()
{
   TripleString kardashian, jenner, others, anotherOne;
   string theString;

   kardashian.setString("kim", "khloe", "kourtney");
   jenner.setString("kylie", "kendall", "kris");
   others.setString("rob", "kanye", "caitlyn");
   anotherOne.setString("", "", "");

   cout << theString << endl;
}

TripleString::TripleString()
{
   string1 = DEFAULT_STRING;
   string2 = DEFAULT_STRING;
   string3 = DEFAULT_STRING;
}

TripleString::TripleString(string str1, string str2, string str3)
{
   TripleString kardashian, jenner, others, anotherOne;
   string theString;

   theString = kardashian.setString("kim", "khloe", "kourtney");
   theString = jenner.setString("kylie", "kendall", "kris");
   theString = others.setString("rob", "kanye", "caitlyn");
   theString = anotherOne.setString("", "", "");

   if(str1.length() < MIN_LEN)
      theString = DEFAULT_STRING;
   else
      theString = str1;
   if(str2.length() < MIN_LEN)
      theString = DEFAULT_STRING;
   else
      theString = str2;
   if(str3.length() < MIN_LEN)
      theString = DEFAULT_STRING;
   else
      theString = str3;
}

bool TripleString::validString(string str1, string str2, string str3)
{
   string theString;

   if (str1.length() < MIN_LEN && str1.length() > MAX_LEN)
      return false;
   else
      theString = str1;
      theString = str1;
      theString = str1;

   if (str2.length() < MIN_LEN && str2.length() > MAX_LEN)
      return false;
   else
      theString = str2;
      theString = str2;
      theString = str2;

   if (str3.length() < MIN_LEN && str3.length() > MAX_LEN)
      return false;
   else
      theString = str3;
      theString = str3;
      theString = str3;
   return true;
}

string TripleString::getString()
{
   return string1;
}