Update test8b.rb
Update test8b.rb

result:
https://paiza.jp/poh/joshibato/matsue-ruby/result/9a6a958a
neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers,neetsdkasu/Paiza-POH-MyAnswers