Set.java

	public void remove(String s) {
		if(!this.contains(s)) {
			return;
		}
		
		int bucketNr = hash(s) % N;
		
		Item old = null;
		Item cur = buckets[bucketNr];
		if (cur == null) return;
		
		if ( s.equals(cur.value) ) {
			old = cur;
			cur = cur.next;
		} else {
			while( !s.equals(cur.value) ) {
				old = cur;
				cur = cur.next;
			}
		}
		
		//umbiegen
		old.next = cur.next;
		n--;
	}