4 <- 5  (30.0, 100.0)
2 <- 1  (60.0, 83.3)
3 <- 2  (70.0, 85.7)
2 <- 3  (70.0, 85.7)
4 <- 5 1  (10.0, 100.0)
4 <- 5 3  (10.0, 100.0)
3 <- 1 2  (50.0, 80.0)
2 <- 1 3  (40.0, 100.0)
2 <- 1 3 4  (20.0, 100.0)