B33113313132313113313223313331323133313232212331333132313232212121   >>    B3311331313231311331322331333132313331323221233133313231323221212   <<    B33113313132313113313223313331323133313232212331333132313232212123   >>      B33113313132313113313223313331323133313232212331333132313232212122   >>