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