#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 n=myStrlen(s),i;
    tmp=(char*)malloc(sizeof(char)*n*2);
 
    for (i=0;i<n;i++){
        tmp[i]=s[i];
    }
    for (i=0;i<n;i++){
        tmp[i+n]=s[n-i-1];
    }
    tmp[n*2]='\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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