#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]) {
    int i;
    for (i = 0; s[i] != '\0'; i++);
    return i;
}
 
// 回文を生成する関数
char *setPalindrome(char s[]) {
    int size = myStrlen(s);
    char *tmp = (char *)malloc(sizeof(char) * (2 * size + 1));
    if (tmp == NULL) {
        return NULL; // malloc失敗時の対応
    }
 
    int i;
    for (i = 0; i < size; i++) {
        tmp[i] = s[i];  // 前半：元の文字列
    }
    for (i = 0; i < size; i++) {
        tmp[i + size] = s[size - i - 1];  // 後半：逆順
    }
 
    tmp[2 * size] = '\0'; // 終端文字
    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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