#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;
    int t;
    t=myStrlen(s);
	//以下に必要な宣言を含めて書いてください
    tmp = (int *)malloc(sizeof(int) *t);
    if(tmp == NULL){
    printf("ERROR\n");
    return 0;
    }
    int k , j;
    j=0;
    for(k=0;k<t;k++){
    tmp[k]=s[k];
}
 for(k=0;k<t;k++){
    tmp[t+k]=s[t-k-1];
}
 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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