#include <iostream>
using namespace std;
string move_special_characters_to_beginning(string s) {
int len = s.length();
string chars = "", pecial_characters = "";
for (int i = 0; i < len; i++) {
char ch = s.at(i);
if (isalnum(ch) || ch == ' ')
chars += ch;
else
pecial_characters += ch;
}
return pecial_characters + chars;
}
int main()
{
string s("c++14$vb.net&^java*() php <>/python 3.7.3");
cout << move_special_characters_to_beginning(s);
return 0;
}
/*
run:
++$.&^*()<>/..c14vbnetjava php python 373
*/
