#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;
	int mojisuu=0;
	mojisuu=myStrlen(s);
	char *tmp;
	//以下に必要な宣言を含めて書いてください
    tmp=(char*)malloc(mojisuu*2+1);
    if(tmp==NULL){
    	return s;
    }
    for(i=0;i<mojisuu;i++){
    	tmp[i]=s[i];
    }
    for(i=0;i<mojisuu;i++){
    	//s[mojisuu+i]=tmp[(mojisuu-1)-i];
    	tmp[(mojisuu*2-1)-i]=tmp[i];
    }
    return tmp;
 
}
 
 
//メイン関数はいじる必要はありません
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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