C1111233131211111211113313331333133313331333133313331323133313113311111   >>    C111123313121111121111331333133313331333133313331333132313331311331111   <<    C1111233131211111211113313331333133313331333133313331323133313113311113   >>      C1111233131211111211113313331333133313331333133313331323133313113311112   >>