#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]){
    int i;
    for(i=0;s[i]!='\0';i++);
    return i;
}
// 回文を作る関数
char *setPalindrome(char s[]){
    char *tmp;
    int i;
    int n;
    // 文字列の長さを調べる
    n = myStrlen(s);
    // 文字列の2倍＋終端文字分のメモリを確保
    tmp = (char *)malloc(sizeof(char) * (n * 2 + 1));
    // 元の文字列をコピーする
    for(i=0;i<n;i++){
        tmp[i] = s[i];
    }
    // 元の文字列を逆順に追加する
    for(i=0;i<n;i++){
        tmp[n+i] = s[n-1-i];
    }
    // 文字列の終わりを設定
    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];
    char *kaibun;
 
    scanf("%s",nyuryoku);
 
    kaibun = setPalindrome(nyuryoku);
 
    printf("%s\n  -> %s\n",nyuryoku,kaibun);
 
    free(kaibun);
 
    return 0;
}

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