#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 i,j,k;
	i=myStrlen(s);
	tmp=(char *)malloc(sizeof(char)*i*2);
	for(j=0;j<i;j++) tmp[j]=s[j];
	for(j=0;j<i;j++){
		for(k=0;tmp[k]==tmp[i+j-k-1];k++){
			if(k==(i+j)/2-1){
				tmp[i+j]='\0';
				return tmp;
			}
		}
		for(k=0;k<=j;k++) tmp[i+k]=tmp[j-k];
	}
}
 
 
//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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