#include <stdio.h>
#include <stdlib.h>
 
// 文字列の長さを取得する関数
int myStrlen(char s[]) {
    int i;
    for (i = 0; s[i] != '\0'; i++);
    return i;
}
 
// 回文を作成し、mallocで確保した領域に入れて返す関数
char *setPalindrome(char s[]) {
    char *tmp;
    int size = myStrlen(s);
    int i;
 
    tmp = (char *)malloc(sizeof(char) * (2 * size + 1));
    if (tmp == NULL) {
        printf("メモリ確保失敗\n");
    }
 
    for (i = 0; i < size; i++) {
        tmp[i] = s[i];
    }
 
    for (i = 0; i < size; i++) {
        tmp[size + i] = s[size - 1 - i];
    }
 
    tmp[2 * size] = '\0';
 
    return tmp;
}
 
// メイン関数（いじる必要なし）
int main() {
    int i;
    char nyuryoku[1024];  
    char *kaibun;         
 
    scanf("%s", nyuryoku);
    kaibun = setPalindrome(nyuryoku);
    printf("%s\n  -> %s\n", nyuryoku, kaibun);
    free(kaibun); 
 
    return 0;
}
 

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