Japanese numeral for Ruby kaigi by usa (kaigi)

#!ruby -n
o,r,a=1,0,"_  \xe4\xb8\x80\xe4\xba\x8c\xe4\xb8\x89\xe5\x9b\x9b\xe4\xba\x94\xe5\x85\xad\xe4\xb8\x83\xe5\x85\xab\xe4\xb9\x9d
 "+s="[\xe5\x8d\x81\xe7\x99\xbe\xe5\x8d\x83]$"
sub(/#{s}/u,'\&_').split(//u).map{|e|o=(n=a.index(e)/3)>9?(r+=o*10**(n-10);1):n}
p r

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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