For owner-occupied units (whether purchased or leased): 03, 08, 13, 18, 23, 28, 33, 38? That is, floors with a mantissa of 3 or 8.
02, 04, 07, 09, 12, 14, 17, 19, 22, 24, 27, 29, 32, 34, 37, 39? That is, floors with a mantissa of 2, 4, 7 or 9.
If the company is only used for investment leasing: 05, 10, 15, 20, 25, 30, 35? That is, floors with a mantissa of 5 or 0.
Avoid choosing 0 1, 06,1,1,2 1, 26,31,36? That is, floors with the suffix 1 or 6.