B33113313132313113313223313331323132322331313113313331323133313232211221123121   >>    B3311331313231311331322331333132313232233131311331333132313331323221122112312   <<    B33113313132313113313223313331323132322331313113313331323133313232211221123123   >>      B33113313132313113313223313331323132322331313113313331323133313232211221123122   >>