C1111233131211111211113313331333133313331333133311221123232113331   >>    C111123313121111121111331333133313331333133313331122112323211333   <<    C1111233131211111211113313331333133313331333133311221123232113333   >>      C1111233131211111211113313331333133313331333133311221123232113332   >>