C1111233131211111211113313331333133313331312331333133313132213223221   >>    C111123313121111121111331333133313331333131233133313331313221322322   <<    C1111233131211111211113313331333133313331312331333133313132213223223   >>      C1111233131211111211113313331333133313331312331333133313132213223222   >>