There is a seven-story skyscraper. Each floor hosts exactly one company.
Pangloss Washers Co, Ltd. is located on the 7th floor.
Alice PC Chips Co., Ltd. is located on the 6th floor.
Jumanji Arcade Co., Ltd. is located on the 5th floor.
Colorful Crafts Co., Ltd. is located on the ___th floor. Can you fill in the blank?
(Credit: this puzzle idea appears in Umineko.)