D121213233313131333132333131211113313232213231333132322331323221231   >>    D12121323331313133313233313121111331323221323133313232233132322123   <<    D121213233313131333132333131211113313232213231333132322331323221233   >>      D121213233313131333132333131211113313232213231333132322331323221232   >>