#include<iostream>
#include<string>
#include<iterator>

std::string reverse_str(std::string str);

int main()
{
    std::string str;
    while(std::cin >> str)
    {
        str = reverse_str(str);
        std::cout << str << std::endl;
    }
    return 0;
}

std::string reverse_str(std::string str)
{
    std::string str_ans;
    for(unsigned long i = 1; i <= str.size(); ++i)
    {
        decltype(str)::iterator it = std::prev(end(str),i);
        str_ans += *it;
    }
    return str_ans;
}