#include<pthread.h>

pthread_mutex_t mutex;

void *beep(char* toprint){
	for(int i = 0; i < 10; i++){
		usleep(1);
		pthread_mutex_lock(&mutex);
		printf("gorilla ");
		usleep(1);
		printf(toprint);
		printf(" sheep");
		printf("\n");
		pthread_mutex_unlock(&mutex);
	}
}

int main(){
	pthread_t t1, t2;
	pthread_create(&t1, 0, beep, "thread 1");
	pthread_create(&t2, 0, beep, "thread 2");

	pthread_join(t1, 0);
	pthread_join(t2, 0);


	return 0;
}