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

string inverser_mot(string s)
{
	int length = s.length();
	char c;
	int i = 0, j = length - 1;

	for (; i < j; ++i, --j)
	{
		c = s.at(i);
		s.at(i) = s.at(j);
		s.at(j) = c;
	}
	return s;
}

string inverser_lettres(string s)
{
	int length = s.length();
	char c;

	for (int i = 0; i < length; ++i)
	{
		if (!isspace(s.at(i)))
		{
			string toReplace = s.substr(i, s.find_first_of(' ', i) - i);
			i = i + toReplace.length()-1;
			s.replace(s.find(toReplace), toReplace.length(), inverser_mot(toReplace));
		}
	}
	return s;
}

int main()
{
	string s = " j'aime   mon prof  ";
	cout << s << endl;
	s = inverser_lettres(s);
	cout << s;

	return 0;
}