#include <iostream>
#include <vector>
#include <string>
#include <set>
#include <map>
#include <sstream>
 
using namespace std;
string Reverse(char * word)
{
 
    char * end = word;
	while(*end)
		++end;
	--end;
 
	char tem;
	while(word < end) {
		 tem = *word;
		 *word = *end;
		 *end = tem;
 
		 ++word;
		 --end;
	}
 
    return end;
}
 
int main(int argc, char * argv[]){
 
    string s = Reverse("piegh");
 
	cout << s << endl;
    return 0;
}

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