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

using namespace std;

static string reverseWords(string const& instr)
{
    istringstream iss(instr);
    string outstr;
    string word;
    iss >> outstr;
    while (iss >> word)
        outstr = word + ' ' + outstr;
    return outstr;
}

int main()
{
    string s = "   one   two \t three four  ";
    string sret = reverseWords(s);
    cout << "in='" << s << "' " << "out='" << sret << "'" << endl;
    return 0;
}