C1111233131211111211113313331333133313331333133313331333121111331323123132321   >>    C111123313121111121111331333133313331333133313331333133312111133132312313232   <<    C1111233131211111211113313331333133313331333133313331333121111331323123132323   >>      C1111233131211111211113313331333133313331333133313331333121111331323123132322   >>