#include <stdio.h>
#include <string.h>
#include <ctype.h>
void decode_message(char *message){
    int len=strlen(message);
    int start=0;
    for(int i=0;i<len;i++){
        if(!isalpha(message[i]) && message[i]!=''){
            printf("Invalid input\n");
            return ;
        }
    }
    for(int i=0;i<=len;i++){
        if(message[i]=='' || message[i]=='\0'){
            int end=i-1;
            while(start <end){
                char temp=message[start];
                message[start]=message[end];
                message[end]=temp;
                start++;
                end--;
            }
            start=i+1;
        }
    }
    printf("%s\n",message);
}
int main(){
    char message[101];
    fgets(message,sizeof(message),stdin);
    message[strcspn(message,"\n")]=0;
    decode_message(message);
    return 0;
    
}