C1111233131211111211113313331333133313112121131211113313223313232212331   >>    C111123313121111121111331333133313331311212113121111331322331323221233   <<    C1111233131211111211113313331333133313112121131211113313223313232212333   >>      C1111233131211111211113313331333133313112121131211113313223313232212332   >>