#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]){
    int i;
    for(i=0;s[i]!='\0';i++);
    return i;
    }
 
char *setPalindrome(char s[]){
	char *tmp;
 
    int m=myStrlen(s);
    int i;
    tmp=(char*)malloc(sizeof(char)*(m*2+1));
    for(i=0;i<m;i++){
    tmp[i]=s[i];
    }
    for(i=0;i<m-1;i++){
    tmp[m+i]=s[m-2-i];
    }
    if(m>0){
    tmp[m*2-1]='\0';
    }else{
    tmp[0]='\0';
    }
    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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