C1111233131211111211113313331333133313331333133313331333133313232223222321   >>    C111123313121111121111331333133313331333133313331333133313331323222322232   <<    C1111233131211111211113313331333133313331333133313331333133313232223222323   >>      C1111233131211111211113313331333133313331333133313331333133313232223222322   >>