B3311331313231311331322331333132333132332113313331333133313233313232332313221   >>    B331133131323131133132233133313233313233211331333133313331323331323233231322   <<    B3311331313231311331322331333132333132332113313331333133313233313232332313223   >>      B3311331313231311331322331333132333132332113313331333133313233313232332313222   >>