C1111233131211111211113313331333133313331312331333133112312111133131323221   >>    C111123313121111121111331333133313331333131233133313311231211113313132322   <<    C1111233131211111211113313331333133313331312331333133112312111133131323223   >>      C1111233131211111211113313331333133313331312331333133112312111133131323222   >>