#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 i;
    char *tmp = (char *)malloc(sizeof(char) * (2 * len + 1)); // 元の文字列 + 逆順 + '\0'
 
    // 先に元の文字列をコピー
    for(i = 0; i < len; i++) {
        tmp[i] = s[i];
    }
 
    // 逆順に追加
    for(i = 0; i < len; i++) {
        tmp[len + i] = s[len - 1 - i];
    }
 
    tmp[2 * len] = '\0'; // 文字列の終端
    return tmp;
}
 
int main() {
    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;
}
 
 

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