(move-b-to-t b20 b19)
(move-b-to-t b19 b18)
(move-b-to-t b18 b17)
(move-b-to-t b17 b16)
(move-b-to-t b16 b15)
(move-b-to-t b15 b14)
(move-b-to-t b14 b13)
(move-b-to-t b13 b12)
(move-b-to-t b12 b11)
(move-b-to-t b11 b10)
(move-b-to-t b10 b9)
(move-b-to-t b9 b8)
(move-b-to-t b8 b7)
(move-b-to-t b7 b6)
(move-b-to-t b6 b5)
(move-b-to-t b5 b4)
(move-b-to-t b4 b3)
(move-b-to-t b3 b2)
(move-b-to-t b2 b1)
(move-b-to-t b1 g20)
(move-t-to-b b2 b1)
(move-t-to-b b3 b2)
(move-t-to-b b4 b3)
(move-t-to-b b5 b4)
(move-t-to-b b6 b5)
(move-t-to-b b7 b6)
(move-t-to-b b8 b7)
(move-t-to-b b9 b8)
(move-t-to-b b10 b9)
(move-t-to-b b11 b10)
(move-t-to-b b12 b11)
(move-t-to-b b13 b12)
(move-t-to-b b14 b13)
(move-t-to-b b15 b14)
(move-t-to-b b16 b15)
(move-t-to-b b17 b16)
(move-t-to-b b18 b17)
(move-t-to-b b19 b18)
(move-t-to-b b20 b19)
(move-b-to-t g20 g19)
(move-b-to-t g19 g18)
(move-b-to-t g18 g17)
(move-b-to-t g17 g16)
(move-b-to-t g16 g15)
(move-b-to-t g15 g14)
(move-b-to-t g14 g13)
(move-b-to-t g13 g12)
(move-b-to-t g12 g11)
(move-b-to-t g11 g10)
(move-b-to-t g10 g9)
(move-b-to-t g9 g8)
(move-b-to-t g8 g7)
(move-b-to-t g7 g6)
(move-b-to-t g6 g5)
(move-b-to-t g5 g4)
(move-b-to-t g4 g3)
(move-b-to-t g3 g2)
(move-b-to-t g2 g1)
(move-b-to-t g1 r20)
(move-t-to-b g2 g1)
(move-t-to-b g3 g2)
(move-t-to-b g4 g3)
(move-t-to-b g5 g4)
(move-t-to-b g6 g5)
(move-t-to-b g7 g6)
(move-t-to-b g8 g7)
(move-t-to-b g9 g8)
(move-t-to-b g10 g9)
(move-t-to-b g11 g10)
(move-t-to-b g12 g11)
(move-t-to-b g13 g12)
(move-t-to-b g14 g13)
(move-t-to-b g15 g14)
(move-t-to-b g16 g15)
(move-t-to-b g17 g16)
(move-t-to-b g18 g17)
(move-t-to-b g19 g18)
(move-t-to-b g20 g19)
; cost = 78 (unit cost)