work this out if it makes sense
On the first four matchdays, when matches are played only on Thursdays, six groups play their matches at 19:00 CET/CEST, while the other six groups play their matches at 21:05 CET/CEST, with the two sets of groups (A–F, G–L) alternating between each matchday. On the final two matchdays, when matches are played on both Wednesdays and Thursdays, the two sets of groups are divided into four smaller subsets (A–C, D–F, G–I, J–L), with each subset of groups playing on a different day and time. Based on this principle, the draw is controlled for clubs from the same association. For example, if there are two teams from the same association, each team will be drawn into a different set of groups (A–F, G–L); if there are four teams from the same association, each team will be drawn into a different subset of groups (A–C, D–F, G–I, J–L).
