#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
    char s[101];
    fgets(s, 101, stdin);
    s[strcspn(s, "\n")] = 0;
    for (int i = 0; s[i]; && s[i] != '') {
        printf("Invalid input");
        return 0;
    }
}
char *word = strtok(s," ");
while (word) {
    for (int i = strlen(word) - 1; i >= 0; i--)
    printf("%c" , word[i]);
    word = strtok(NULL, " ");
    if (word) printf(" ");
}
return 0;