B3311331313231311331322331333132313331322121133133313331333132223211231231   >>    B331133131323131133132233133313231333132212113313331333133313222321123123   <<    B3311331313231311331322331333132313331322121133133313331333132223211231233   >>      B3311331313231311331322331333132313331322121133133313331333132223211231232   >>