C1111233131211111211113313331333133313311221333131133132212331322221   >>    C111123313121111121111331333133313331331122133313113313221233132222   <<    C1111233131211111211113313331333133313311221333131133132212331322223   >>      C1111233131211111211113313331333133313311221333131133132212331322222   >>