#include <stdio.h>
#include <stdlib.h>

int myStrlen(char s[]){
    int i;
    for(i = 0; s[i] != '\0'; i++);
    return i;
}

char *setPalindrome(char s[])
{
    int len = myStrlen(s);
    int total_len = 2 * len;
    char *tmp = (char *)malloc((total_len + 1) * sizeof(char));

    if (tmp == NULL)
{
        fprintf(stderr, "Memory allocation failed\n");
        return NULL;
    						}


    for (int i = 0; i < len; i++)
{
        tmp[i] = s[i];               
        tmp[total_len - 1 - i] = s[i];
    										}
    tmp[total_len] = '\0';

    return tmp;
}

int main(){
    int i;
    char nyuryoku[1024]; // 入力
    char *kaibun;   // 回文を受け取る
    scanf("%s", nyuryoku);
    kaibun = setPalindrome(nyuryoku);
    printf("%s\n  -> %s\n", nyuryoku, kaibun);
    free(kaibun);
    return 0;
}