semaphore e = 10;
semaphore f = 0;
char buf[10];

void producent(){
	int i = 0;
	char c;
	for (c = 'a';c <= 'z'; c++){
		p(e);
		buf[i] = c;
		cout << "Produkuji " << c << endl;
		i = (i + 1) % 10;
		v(f);
	}
}


void konzument(){
	int i;
	char c;
	for(;;){
		p(f);
		c = buf[i];
		i = (i + 1) % 10;
		cout << "Konzumuji " << c << endl;
		v(e);
		if (c == 'z'){
			return;
		}
	}

}
main(){
	cobegin { producent(); konzument(); }
}