C1111233131211111211113313331333133313331322322331312111133133312223123231   >>    C111123313121111121111331333133313331333132232233131211113313331222312323   <<    C1111233131211111211113313331333133313331322322331312111133133312223123233   >>      C1111233131211111211113313331333133313331322322331312111133133312223123232   >>