League of Legends competition was held and 26 teams signed up. How to divide it?

The draw is divided into AB and AB groups, and each group has a bye. Hey, hey, you can give what you want.

Then the remaining 14 was divided into three groups or disrupted ABC group, but only two people in Group C were in bye group.

How to treat 3+1 and divide it into two groups? Yes, the last two teams are competing for the championship.