#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;
    tmp = (char*)malloc(sizeof(char)*myStrlen(s));
 
    for(int i=0;s[i]!='\0';i++){
        tmp[i]=s[i];
    }
    int cnt=0;
    printf("myStrlen %d\n",myStrlen(s));
    for(int i=myStrlen(s)*2-1;i>=myStrlen(s);i--){
        tmp[i]=s[cnt];
        cnt++;
    }
    tmp[myStrlen(s)*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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