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