B3311331313231311331322331333132313331322121133133313331333133313233211211   >>    B331133131323131133132233133313231333132212113313331333133313331323321121   <<    B3311331313231311331322331333132313331322121133133313331333133313233211213   >>      B3311331313231311331322331333132313331322121133133313331333133313233211212   >>