#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[]){
    int i, j, w, k, m = 1;
	char *tmp;
    k = myStrlen(s);
    w = k * 2 + 1;
    tmp = (char *)malloc(sizeof(char)*w);
    for(i=0;i<=k;i++){
         tmp[i] = s[i];
    }
    for(j=0;j<=k;j++){
        tmp[k + j] = s[k - j - 1];
    }
	//以下に必要な宣言を含めて書いてください
    return tmp;
    free(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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