#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;
	//以下に必要な宣言を含めて書いてください
	int counter = myStrlen(s);
	int a = 0;
 
	tmp = (char *)malloc(sizeof(char)*counter*2);
 
	for(int i = 0; i < counter; i++)
	{
		tmp[i] = s[i];
	}
 
	for(int i = counter - 1; i >= 0; i--)
	{
		tmp[counter + a] += s[i];
		a++;
	}
 
	return tmp;
}
 
 
//メイン関数はいじる必要はありません
int main(){
    int i;
    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;
}
 
/*
方針
➔文字数を数え、半分の位置から回文になりかけているかチェック➔足りていない部分を足す
*/

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