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