C1111233131211111211113313331333133313331322322331312111133232221   >>    C111123313121111121111331333133313331333132232233131211113323222   <<    C1111233131211111211113313331333133313331322322331312111133232223   >>      C1111233131211111211113313331333133313331322322331312111133232222   >>