23456 B M W 54632 - - 43526 - 25634 - - 53246 - 23645 - a 34256 2 2 Repeat twice, omitting 'a' from any two parts. a = sT,sF.
For 5,154 call 'a' in all three parts, but replace the final 2W by a single, bringing up rounds two blows later.
Either length is also true to Amsterdam, Fordcombe, Gainsborough, Johannesburg, Nailstone, Vancouver, Yorkshire and Zurich.
The 5,024 is true to all BacZ, and the 5,154 is true to all BacZ that begin with place notation x3.