skit

@Override
	public boolean equals(Object o) {
	    if (o == this) {
	        return true;
	    }
	    if (!(o instanceof Side)) {
	        return false;
	    }
	    Side side = (Side) o;
	    return p1.equals(side.p1) && p2.equals(side.p2);
	}
	@Override
	public int hashCode() {
	    int result = 17;
	    result = 31 * result + p1.hashCode();
	    result = 31 * result + p2.hashCode();
	    return result;
	}