2341,2340,2339,2339,2342,2343,2342,2340,2341,2342,2343,2344,2345,2346,2346,2345,2344,2343,2343,2342,2343,2343,2342;873,873,872,871,872,871,871,870,869,869,870,870,871,871,872,873,873,872,871,872,873,874,874