C1111233131211111211113313331333133313331312331333133112312232321   >>    C111123313121111121111331333133313331333131233133313311231223232   <<    C1111233131211111211113313331333133313331312331333133112312232323   >>      C1111233131211111211113313331333133313331312331333133112312232322   >>