#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[]){/*s=入力した文字列*/
	char *tmp;
	//以下に必要な宣言を含めて書いてください
    int len = myStrlen(s);
    int y = len;//最後の文字
    tmp = malloc(sizeof(char) * len * 2 - 1);//末尾の文字-1 
    int count = sizeof(tmp)-1;   
    char tmp_copy[sizeof(tmp)];
 
    for(int i=0; i<sizeof(tmp); i++) tmp_copy[i]=tmp[i];
 
    for(int i=0; i<len; i++){
        tmp[count]=tmp_copy[i];
        count--;
        }
    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;
}

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