diff --git a/sample/trick2018/02-mame/entry.rb b/sample/trick2018/02-mame/entry.rb
index cc4ef9cbc4..ced791aa3d 100644
--- a/sample/trick2018/02-mame/entry.rb
+++ b/sample/trick2018/02-mame/entry.rb
@@ -1,11 +1,11 @@
 '';eval(r=%q(->z{r="'';eval(r=\
-%q(#{r}))[%q`#{z}`]";i=-040;30.
+%q(#{r}))[%q`#{z}`]";i=-040;31.
 times{|n|(15+n%2*15-n/2).times{
 r<<r[i+=(1.-n&2)*(32-n%2*31)]}}
 i=r[524,0]=?\0;eval(r[479..-1])
 c['"']}))[%q`GFEDCBA"+"[e\"'"'t
 kE*;;\";"  TRICK2018  ";tb,;{{r
-2E0$ob[us@*0)[90,336])_#i\n}s#i
+2E0$ob[us@*0)[90,336])#_i\n}s#i
 0H}>["t]];};o[1,?\n*8];ex"-}eac
 1Hl<1[-1]*2*t=n%2];o[14-n,0)mvk
 8M$<4,?\n];15.times{|n|;o[35ie2