In a Beaver Water Slide race, there are two slides merging into a finish gate. Slide 1 has three beavers: Red, Green, and Blue. Slide 2 has three beavers: 1, 2, and 3. The merging rule is: 'Release the first beaver from Slide 1, then the first two beavers from Slide 2, then the remaining beavers from Slide 1, and finally the last beaver from Slide 2.' What is the final sequence of beavers?