B331133131323131133132233133313231323132333133313112133313231333132322132212121   >>    B33113313132313113313223313331323132313233313331311213331323133313232213221212   <<    B331133131323131133132233133313231323132333133313112133313231333132322132212123   >>      B331133131323131133132233133313231323132333133313112133313231333132322132212122   >>