#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]){
    int i;
    for(i=0;s[i]!='\0';i++);
    return i;
}
char *setPalindrome(char s[]){
    int len=myStrlen(s);
    int i,j;
    char*tmp=(char*)malloc((2*len+1)*sizeof(char));
    if(tmp==NULL){
        return NULL;
    }
    for(i=0;i<len;i++){
        tmp[i]=s[i];
    }
    for(i=0,j=len;i<len;i++,j++){
        tmp[j]=s[len-i-1];
    }
    tmp[2*len]='\0';
    return tmp;
}
int main(){
    char nyuryoku[1024];
    char *kaibun;        
    scanf("%s",nyuryoku);
    kaibun=setPalindrome(nyuryoku);
    if(kaibun==NULL){
        printf("メモリの確保に失敗しました。\n");
        return 1;
    }
    printf("%s\n->%s\n",nyuryoku,kaibun);
    free(kaibun);
    return 0;
}

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