B3311331313231311331322331333132313233313231333131333133313231322132211211   >>    B331133131323131133132233133313231323331323133313133313331323132213221121   <<    B3311331313231311331322331333132313233313231333131333133313231322132211213   >>      B3311331313231311331322331333132313233313231333131333133313231322132211212   >>