C1111233131211111211113313331333133313331333133313331333133313332213112121   >>    C111123313121111121111331333133313331333133313331333133313331333221311212   <<    C1111233131211111211113313331333133313331333133313331333133313332213112123   >>      C1111233131211111211113313331333133313331333133313331333133313332213112122   >>