#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 m = myStrlen(s);
 
    tmp = (char *)malloc(1*((m*2)+1));
        if(tmp == NULL){
            printf("ERROR\n");
            return 0;
        }
 
    for(int i=0; i<m; i++)
        tmp[i]=s[i];
int k=m-1;
    for(int j=m; j<m*2; j++){ 
        tmp[j]=s[k];
        k--;
    }
tmp[m*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];
    char *kaibun;
    scanf("%s",nyuryoku);
    kaibun = setPalindrome(nyuryoku);
    printf("%s\n  -> %s\n",nyuryoku,kaibun);
    free(kaibun);
    return 0;
}

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