#include<iostream>
#include<string.h>
using namespace std;
#pragma warning(disable:4996)


int main() {
    char* myStr;
    char* str1;
    cin >> myStr;
    //myStr = new char[strlen(myStr) + 1];

    strcpy(myStr,str1 );
    cout << myStr;
    //str1 = new char[strlen(str1) + 1];
    int i = 0;
    while (myStr[i] != '\0') {
        str1[i] = myStr[i];
        i++;
    }
    str1[i] = '\0';
    cout << str1 << endl;



    return 0;
}