Amazing Automatic BMX Track

"-18 1i 18 1i,-16 1a -7 1k,k a7 7g ed,bg iv co iv,is lj ic m4 hr ml h6 n3 gc nf,9u 12j a5 138 ae 13r am 14e b0 150 be 15l c0 167 cl 16o dc 178 ea 17m f7 180 g3 188 gu 18b hm 18b ia 181,ps 196 pi 19t p1 1aj,136 8fs 15l 8g3,1fq 8k0 1fg 8ke,lp 1fr lp 1gg lr 1h8 lv 1i0 m8 1ir ml 1jj na 1k9 o5 1kt p2 1la ..."