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