B33113313132313113313223313331323223313221123313231323132312121   >>    B3311331313231311331322331333132322331322112331323132313231212   <<    B33113313132313113313223313331323223313221123313231323132312123   >>      B33113313132313113313223313331323223313221123313231323132312122   >>