B331133131323131133132233133313113313231333131323221323133313231323223313123121   >>    B33113313132313113313223313331311331323133313132322132313331323132322331312312   <<    B331133131323131133132233133313113313231333131323221323133313231323223313123123   >>      B331133131323131133132233133313113313231333131323221323133313231323223313123122   >>