B33113313132313113313223313331323223313221123313231323223313113313232233312121   >>    B3311331313231311331322331333132322331322112331323132322331311331323223331212   <<    B33113313132313113313223313331323223313221123313231323223313113313232233312123   >>      B33113313132313113313223313331323223313221123313231323223313113313232233312122   >>