#include <iostream>
#include <cstring>

int main()
{
    using namespace std;
    char *ch = new char[1000];
    int i = 0;
    cin>>ch;
    for(i=strlen(ch)-1;i>=0;i--)
    {
        cout<<ch[i];
    }
    
    delete [] ch;
    return 0;
}