... -S2, 21-S3, F97-S3, 22-S4, 24-S2, 26-S2 ... , 79, 84
4-star: 2, 3, 4, 5, 6, 9, ... say yes. Given how many 4- and 5-star difficulty sections ... perhaps even going through one 4- or 5-star passage on ... to challenge myself with older 4- or 5-star difficulty sections ...