b0 n0 20 s55 n3 10 b0 n5 -10 s59 n5 -50 s60 n5 20 b0 n6 10 s51 n6 -10 s53 n6 -10 n3 n0 -20 n5 n0 -20 n6 n0 -20 n3 n5 -20 n6 n3 -20 n6 n5 -20