#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 l;
	for(l=0; s[l]!='\0';l++){}
	tmp=(char*)malloc(sizeof(char)*l*2);
	if(tmp==NULL){
		printf("ERROR\n");
		return 0;
	}
	for(int i=0; i<l; i++){
		tmp[i]=s[i];
	}
	for(int i=0; i<l; i++){
		for(int j=0; j<=i; j++){
			tmp[l+j]=s[i-j];
		}
		//printf("%s\n",tmp);
		int kl, f=1;
		for(kl=0; tmp[kl]!='\0';kl++){}
		for(int k=0;k<kl;k++,kl--){
			if(tmp[kl-1]!=tmp[k]){
				f=0;
			}
		}
		if(f){
			break;
		}
	}
	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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