B3311331313231311331322331333132313331322121133133313331333133322112321   >>    B331133131323131133132233133313231333132212113313331333133313332211232   <<    B3311331313231311331322331333132313331322121133133313331333133322112323   >>      B3311331313231311331322331333132313331322121133133313331333133322112322   >>