new file:   RubyStudy/HardStudyRuby/ex01.rb
	new file:   RubyStudy/HardStudyRuby/ex02.rb
	new file:   RubyStudy/HardStudyRuby/ex03.rb
	new file:   RubyStudy/HardStudyRuby/ex03_5.rb
	new file:   RubyStudy/HardStudyRuby/ex04.rb
	new file:   RubyStudy/HardStudyRuby/ex05.rb
	new file:   RubyStudy/HardStudyRuby/ex06.rb
	new file:   RubyStudy/HardStudyRuby/ex07.rb
	new file:   RubyStudy/HardStudyRuby/ex08.rb
	new file:   RubyStudy/HardStudyRuby/ex08_1.rb
	new file:   RubyStudy/HardStudyRuby/ex09.rb
	new file:   RubyStudy/HardStudyRuby/ex10.rb
	new file:   RubyStudy/HardStudyRuby/ex11.rb
	new file:   RubyStudy/HardStudyRuby/ex12.rb
	new file:   RubyStudy/HardStudyRuby/ex12_1.rb
	new file:   RubyStudy/HardStudyRuby/ex13.rb
	new file:   RubyStudy/HardStudyRuby/ex13_3.rb
	new file:   RubyStudy/HardStudyRuby/ex14.rb
	new file:   RubyStudy/HardStudyRuby/ex15.rb
	new file:   RubyStudy/HardStudyRuby/ex15_1.rb
	new file:   RubyStudy/HardStudyRuby/ex15_2.rb
	new file:   RubyStudy/HardStudyRuby/ex15text1.txt
	new file:   RubyStudy/HardStudyRuby/ex15text2.txt
	new file:   RubyStudy/HardStudyRuby/ex16.rb
	new file:   RubyStudy/HardStudyRuby/ex17.rb
	new file:   RubyStudy/HardStudyRuby/ex17_1.rb
	new file:   RubyStudy/HardStudyRuby/ex18.rb
	new file:   RubyStudy/HardStudyRuby/ex19.rb
	new file:   RubyStudy/HardStudyRuby/ex19_1.rb
	new file:   RubyStudy/HardStudyRuby/ex19_2.rb
	new file:   RubyStudy/HardStudyRuby/ex20.rb
	new file:   RubyStudy/HardStudyRuby/ex20_1.rb
	new file:   RubyStudy/HardStudyRuby/ex21.rb
	new file:   RubyStudy/HardStudyRuby/ex21_1.rb
	new file:   RubyStudy/HardStudyRuby/ex21_2.rb
	new file:   RubyStudy/HardStudyRuby/ex21_3.rb
	new file:   RubyStudy/HardStudyRuby/ex21_4.rb
	new file:   RubyStudy/HardStudyRuby/ex22.rb
	new file:   RubyStudy/HardStudyRuby/ex24.rb
	new file:   RubyStudy/HardStudyRuby/ex24_1.rb
	new file:   RubyStudy/HardStudyRuby/ex24_2.rb
	new file:   RubyStudy/HardStudyRuby/ex25.rb
	new file:   RubyStudy/HardStudyRuby/ex26.rb
	new file:   RubyStudy/HardStudyRuby/ex26_1.rb
	new file:   RubyStudy/HardStudyRuby/ex27.rb
	new file:   RubyStudy/HardStudyRuby/ex28.txt
	new file:   RubyStudy/HardStudyRuby/ex29.rb
	new file:   RubyStudy/HardStudyRuby/ex30.rb
	new file:   RubyStudy/HardStudyRuby/ex30_3.rb
	new file:   RubyStudy/HardStudyRuby/ex31.rb
	new file:   RubyStudy/HardStudyRuby/ex31_1.rb
	new file:   RubyStudy/HardStudyRuby/ex31_2.rb
	new file:   RubyStudy/HardStudyRuby/ex32.rb
	new file:   RubyStudy/HardStudyRuby/ex32_2.rb
	new file:   RubyStudy/HardStudyRuby/ex33.rb
	new file:   RubyStudy/HardStudyRuby/ex33_0.rb
	new file:   RubyStudy/HardStudyRuby/ex33_1.rb
	new file:   RubyStudy/HardStudyRuby/ex33_3.rb
	new file:   RubyStudy/HardStudyRuby/ex33_5.rb
	new file:   RubyStudy/HardStudyRuby/ex33_6.rb
	new file:   RubyStudy/HardStudyRuby/ex34.rb
	new file:   RubyStudy/HardStudyRuby/ex35.rb
	new file:   RubyStudy/HardStudyRuby/ex35_4.rb
	new file:   RubyStudy/HardStudyRuby/ex35_5.rb
	new file:   RubyStudy/HardStudyRuby/ex36.txt
	new file:   RubyStudy/HardStudyRuby/ex39.rb
	new file:   RubyStudy/HardStudyRuby/ex39_1.rb
	new file:   RubyStudy/HardStudyRuby/ex39_2.rb
	new file:   RubyStudy/HardStudyRuby/ex40.rb
	new file:   RubyStudy/HardStudyRuby/ex40_0.rb
	new file:   RubyStudy/HardStudyRuby/ex40_1.rb
	new file:   RubyStudy/HardStudyRuby/ex41.rb
	new file:   RubyStudy/HardStudyRuby/ex41_0.rb
	new file:   RubyStudy/HardStudyRuby/ex42.rb
	new file:   RubyStudy/HardStudyRuby/ex42_0.rb
	new file:   RubyStudy/HardStudyRuby/ex42_0_1.rb
	new file:   RubyStudy/HardStudyRuby/ex42_1.rb
	new file:   RubyStudy/HardStudyRuby/ex42_1_1.rb
	new file:   RubyStudy/HardStudyRuby/ex42_2.rb
	new file:   RubyStudy/HardStudyRuby/ex42_3.rb
	new file:   RubyStudy/HardStudyRuby/ex44.rb
	new file:   RubyStudy/HardStudyRuby/ex44_1.rb
	new file:   RubyStudy/HardStudyRuby/ex45.rb
	new file:   RubyStudy/HardStudyRuby/ex46/skeleton/NAME.gemspec
	new file:   RubyStudy/HardStudyRuby/ex46/skeleton/lib/NAME.rb
	new file:   RubyStudy/HardStudyRuby/ex46/skeleton/lib/NAME/version.rb
	new file:   RubyStudy/HardStudyRuby/ex46/skeleton/spec/empty_string_spec.rb
	new file:   RubyStudy/HardStudyRuby/ex46/skeleton/test/test_NAME.rb
	new file:   RubyStudy/HardStudyRuby/ex46/skeleton/user_spec.rb
	new file:   RubyStudy/HardStudyRuby/ex47/ex47.gemspec
	new file:   RubyStudy/HardStudyRuby/ex47/lib/ex47.rb
	new file:   RubyStudy/HardStudyRuby/ex47/lib/ex47/version.rb
	new file:   RubyStudy/HardStudyRuby/ex47/spec/empty_string_spec.rb
	new file:   RubyStudy/HardStudyRuby/ex47/test/test_ex47.rb
	new file:   RubyStudy/HardStudyRuby/ex47/user_spec.rb
	new file:   RubyStudy/HardStudyRuby/hello
	new file:   RubyStudy/HardStudyRuby/hello.rb
	new file:   RubyStudy/SelfStudyRuby/system.rb