B331133131323131133132233133313231323223313233213231333133311231   >>    B33113313132313113313223313331323132322331323321323133313331123   <<    B331133131323131133132233133313231323223313233213231333133311233   >>      B331133131323131133132233133313231323223313233213231333133311232   >>