C1111233131211111211113313331333133313331312331333131122213232321   >>    C111123313121111121111331333133313331333131233133313112221323232   <<    C1111233131211111211113313331333133313331312331333131122213232323   >>      C1111233131211111211113313331333133313331312331333131122213232322   >>