#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 len_s;
    int len_p;
    int i,j;
 
    len_s = myStrlen(s);
 
    len_p = len_s * 2;
 
    tmp = (char *)malloc(sizeof(char) * (len_p + 1));
 
    if (tmp == NULL) {
        fprintf(stderr, "メモリ確保に失敗しました。\n");
        return NULL;
    }
 
    for (i = 0; i < len_s; i++) {
        tmp[i] = s[i];
    }
 
    for (i = 0, j = len_s - 1; i < len_s; i++, j--) {
        tmp[len_s + i] = s[j];
    }
 
    tmp[len_p] = '\0';
 
    return tmp;
 
	//以下に必要な宣言を含めて書いてください
}
 
 
//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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