#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;
	int a,i;
	a=myStrlen(s);
	tmp=(char*)malloc(sizeof(char)*(a*2+1));
 
	for(i=0;s[i]!='\0';i++){
		tmp[i]=s[i];
	}
	printf("%d\n",i);	
 
	int b=i-1,k=1;
	printf("b=%d\n",b);
	for(int j=b;j>=0;j--){
		printf("%d\n",j);
		tmp[b+k]=s[j];
		k++;
 
	}
		return tmp;
	}
 
	//以下に必要な宣言を含めて書いてください
 
 
 
//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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