If Jacobson swims lap 8, then for exactly how many of the ten laps can one determine which team member swims the lap?

Emil-Kunkin on November 22, 2023

Hi, let's see what happens if we know that J is in 3 and 8.

_ _ j _ _ _ _ j _ _

In this case, we know that O comes before j, and it must be the case for both Os and both Js here. So we have

_ o j _ _ _ o j _ _

We also know that m must come before o, so we have

M o j _ _ m o j _ _

And finally, since k can't be immediately before l, we have

m o j l k m o j l k