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programs / chidori / rand.rb
#!/usr/bin/env ruby


muki = ["上" , "下" , "右" , "左"]

print("あっち向いてほい対決スタート\n")
sleep(2)

puts "あっち"
sleep(1)
puts "向いて"
sleep(1)
puts "ほい"
sleep(1)

srand
erabu = rand(4)
printf("%s\n",muki[erabu])