B3311331313231311331322331333132333132313132333112331323133313231333132211211   >>    B331133131323131133132233133313233313231313233311233132313331323133313221121   <<    B3311331313231311331322331333132333132313132333112331323133313231333132211213   >>      B3311331313231311331322331333132333132313132333112331323133313231333132211212   >>