How about 18 and 13 floors?

This is a livable and comfortable residential area.

Building 13 is located in the middle and upper part of the total floor and has many advantages. First of all, the floor is relatively high, so you can enjoy better vision and light, while reducing noise interference. Secondly, the height of 13 floor will neither make people feel too crowded nor too isolated, providing a balanced living environment. Moreover, the residential area of 13 floor is usually less disturbed by noise from upstairs and downstairs, which makes living more quiet and comfortable. Therefore, 13 floor is a livable and comfortable residential area.