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