#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]){
    int i;
    for(i = 0; s[i] != '\0'; i++);
    return i;
}
 
// 回文を作る関数
char *setPalindrome(char s[]){
    char *tmp;
    int len = myStrlen(s);
    int i;
 
    // 元文字列 + 逆順 + 終端文字
    tmp = (char *)malloc((len * 2 + 1) * sizeof(char));
 
    // 前半コピー
    for(i = 0; i < len; i++){
        tmp[i] = s[i];
    }
 
    // 後半に逆順を追加
    for(i = 0; i < len; i++){
        tmp[len + i] = s[len - 1 - i];
    }
 
    // 文字列の終端
    tmp[len * 2] = '\0';
 
    return tmp;
}
 
// メイン関数
int main(){
    char nyuryoku[1024]; // 入力
    char *kaibun;        // 回文
 
    scanf("%s", nyuryoku);
    kaibun = setPalindrome(nyuryoku);
 
    printf("%s\n  -> %s\n", nyuryoku, kaibun);
 
    free(kaibun); // メモリ解放
    return 0;
}
 

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