#include <sys/syscall.h>
#include <string.h>
#include <stdio.h>

#define SYS_HELLOWORLD		281

int main()
{
        char out[100], in[100];
 	int n = 0;

        int ret;

	strcpy(in, "Hello world");
	n = strlen(in);
	
        syscall(SYS_HELLOWORLD, out, in, n);

	printf("\n%s\n\n", out);

        return 0;	
}