C1111233131211111211113313331333133313331312331333131133133313331123313221   >>    C111123313121111121111331333133313331333131233133313113313331333112331322   <<    C1111233131211111211113313331333133313331312331333131133133313331123313223   >>      C1111233131211111211113313331333133313331312331333131133133313331123313222   >>