C1111233131211111211113313331333133313331333133313331333133313112123211331   >>    C111123313121111121111331333133313331333133313331333133313331311212321133   <<    C1111233131211111211113313331333133313331333133313331333133313112123211333   >>      C1111233131211111211113313331333133313331333133313331333133313112123211332   >>