algorithm

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>

using namespace std;
int main()
{
    vector <string> names;

    names.push_back("WXH");
    names.push_back("WX");
    names.push_back("W");
    names.push_back("ZXY");
    names.push_back("ZX");
    names.push_back("Z");

    sort(names.begin(),names.end());
    vector<string>::iterator iter =names.begin();

    while( iter != names.end())
    {
        cout << *iter <<endl;
        iter++;
    }

    return 0;
}