B33113313132313113313223313331323331323121123313233313232212121   >>    B3311331313231311331322331333132333132312112331323331323221212   <<    B33113313132313113313223313331323331323121123313233313232212123   >>      B33113313132313113313223313331323331323121123313233313232212122   >>