#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
 
tmp=(char*)malloc(sizeof(char)*(2*myStrlen(s)+1));
if(tmp==NULL){
  printf("error");
}
int l,j;
l=myStrlen(s);
for(j=0; j<l; j++){
	tmp[j]=s[j];
}
for(j=0; j<l; j++){
   tmp[j+l]=s[l-j-1];
}
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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