#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[]) {
    int len = myStrlen(s);
    char *tmp = (char *)malloc((2 * len + 1) * sizeof(char));
 
    if (tmp == NULL) {
        printf("error\n");
        return NULL;  
    }
    for (int i = 0; i < len; i++) {
        tmp[i] = s[i];
    }
    for (int i = 0; i < len - 1; i++) {
        tmp[len + i] = s[len - 2 - i]; 
    }
    tmp[2 * len - 1] = '\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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