R2: 1 sc, ( 8 ch, sk 1, 1 sc ), ( 8 ch, sk 1, 1 sc ), ( 9 ch, sk 1, 1 sc ), ( 7 ch, sk 1, 1 sc ), ( 8 ch, sk 1, 1 sc ), 8 ch, sk 1, 1 ss
R3: 3 ch, ( 1 dc, sk 1, 6 sc, sk 1 ), ( 1 dc, sk 1, 6 sc, sk 1 ), ( 1 dc, sk 1, 7 sc, sk 1), ( 1 dc, sk 1, 5 sc, sk 1), ( 1 dc, sk 1, 6 sc, sk 1), ( 1 dc, sk 1, 6 sc, sk 1)