#include <stdio.h>
#include <stdlib.h>
 
// 文字列の長さを求める関数
int myStrlen(char s[]) {
    int i;
    for (i = 0; s[i] != '\0'; i++);
    return i;
}
 
// 最短回文を作成する関数
char *setPalindrome(char s[]) {
    int len = myStrlen(s);
    int i, j;
 
    // 最長回文前半部分を見つける
    for (i = 0; i < len; i++) {
        int is_palindrome = 1;
        for (j = 0; j < len - i; j++) {
            if (s[j] != s[len - i - 1 - j]) {
                is_palindrome = 0;
                break;
            }
        }
        if (is_palindrome) {
            break;
        }
    }
 
    // 回文を格納するためのメモリ確保
    char *tmp = (char *)malloc((2 * len - i + 1) * sizeof(char));
    if (tmp == NULL) {
        printf("Memory allocation failed\n");
        exit(1);
    }
 
    // 文字列の前半部分をそのままコピー
    for (j = 0; j < len; j++) {
        tmp[j] = s[j];
    }
 
    // 後半部分を反転して追加
    for (j = len - i - 1; j >= 0; j--) {
        tmp[len + (len - i - 1 - j)] = s[j];
    }
 
    tmp[2 * len - i] = '\0';  // 終端文字を追加
 
    return tmp;
}
 
int main() {
    char nyuryoku[1024];  // 入力用の配列
    char *kaibun;         // 回文を受け取る
 
    // 入力を取得
    scanf("%s", nyuryoku);
 
    // 最短回文を生成
    kaibun = setPalindrome(nyuryoku);
 
    // 結果を表示
    printf("%s\n  -> %s\n", nyuryoku, kaibun);
 
    // メモリの解放
    free(kaibun);
    return 0;
}
 

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