#include <iostream>
#include <string>
using namespace std;
int main()
{
string test;
cout << "Enter string: ";
getline(cin, test);
cout << "u write: " << test << endl;
}
#include <iostream>
#include <string>
int main() {
std::string str{"first word and last"};
int ind = str.find(' ');
std::string first_word = str.substr(0, ind);
int ind2 = str.rfind(' ');
std::string last_word = str.substr(ind2+1);
str.replace(0, ind, last_word);
str.replace(ind2, last_word.length(), first_word);
std::cout << str;
return 0;
}