#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 t,j;
		for(j=0;s[j]!='\0';j++){t=j;}
			t=t+1;
 
	tmp= (int *)malloc(sizeof(int)*(2*t+1));
 
	for(j=0;j<t;j++)
		{
			tmp[j]=s[j];
			tmp[2*t-j-1]=tmp[j];
		}
	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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