B331133131323131133132233133313231333132233132313331333132313221323222121   >>    B33113313132313113313223313331323133313223313231333133313231322132322212   <<    B331133131323131133132233133313231333132233132313331333132313221323222123   >>      B331133131323131133132233133313231333132233132313331333132313221323222122   >>