#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]) {
    int i;
    for (i = 0;s[i] != '\0';i++);
    return i;
}
 
// 関数の中でtmpに対してmallocして
// そこに回文を代入してreturnで返しましょう
char* setPalindrome(char s[]) {
    char* tmp;
    int size, i, j;
    size = myStrlen(s);
 
    tmp = (char*)malloc(sizeof(char) * size * 2+1);
 
    for (i = 0;i < size;i++) {
        tmp[i] = s[i];
        tmp[size * 2 - i] = s[i];
    }
 
    return tmp;
 
}
 
 
//メイン関数はいじる必要はありません
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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