gistfile1.cpp

#include <iostream>
#include <algorithm>
#include <ctime>
#include <boost/regex.hpp>

using namespace std;

int main()
{
    srand(time(0));

    string str = "Maybe someone who is not crap 1234 at programming can help yo";

    const boost::regex r("[A-Za-z]+");

    cout << boost::regex_replace(str, r, [](boost::smatch what)
        {
            string s = what.str();
            random_shuffle(s.begin() + 1, s.end() - 1, [](ptrdiff_t i)
                {
                    return rand() % i;
                });
            return s;
        }) << endl;

    return 0;
}