test.rb:13:in `initialize': No such file or directory - inbox/1 (Errno::ENOENT)
        from test.rb:13:in `open'
        from test.rb:13:in `block in <main>'
        from test.rb:12:in `each'
        from test.rb:12:in `each_with_index'
        from test.rb:12:in `<main>'