#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
int myStrlen(char s[]) {
    int i;
    for (i = 0; s[i] != '\0'; i++);
    return i;
}
 
char *setPalindrome(char s[]) {
    int len = myStrlen(s);
    // 回文の長さは len + (len - 1) + 1 (for '\0')
    char *tmp = (char *)malloc((2 * len) * sizeof(char));
    if (tmp == NULL) {
        fprintf(stderr, "Memory allocation failed\n");
        exit(1);
    }
 
    // 元の文字列をコピー
    strcpy(tmp, s);
 
    // 逆順にした文字列を追加
    for (int i = 0; i < len - 1; i++) {
        tmp[len + i] = s[len - i - 2];
    }
    tmp[2 * len - 1] = '\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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