B33113313132313113313223313331323331333132112323133313232211231   >>    B3311331313231311331322331333132333133313211232313331323221123   <<    B33113313132313113313223313331323331333132112323133313232211233   >>      B33113313132313113313223313331323331333132112323133313232211232   >>