#include <stdio.h>
#include <string.h>


int main(void) 
{
    char str[] = "how are you";
    char *p = NULL;

    while ((p = strrchr(str, ' ')) != NULL) 
    {
        printf ("%s ", (p + 1));
        *p = '\0';
        }
    
    printf ("%s\n", str);

    return 0;
    }