C1111233131211111211113313331333133313331312331333131211113311223132321   >>    C111123313121111121111331333133313331333131233133313121111331122313232   <<    C1111233131211111211113313331333133313331312331333131211113311223132323   >>      C1111233131211111211113313331333133313331312331333131211113311223132322   >>