matz = Object.new
def matz.speak
"Place your burdens on the machine's shoulders."
end
puts matz.speak
puts matz.class # => Object
metaclass = class << matz
"abc"
end
puts metaclass.class
bWF0eiA9IE9iamVjdC5uZXcKZGVmIG1hdHouc3BlYWsKICAiUGxhY2UgeW91ciBidXJkZW5zIG9uIHRoZSBtYWNoaW5lJ3Mgc2hvdWxkZXJzLiIKZW5kCgpwdXRzIG1hdHouc3BlYWsKcHV0cyBtYXR6LmNsYXNzICMgPT4gT2JqZWN0CgptZXRhY2xhc3MgPSBjbGFzcyA8PCBtYXR6CiAiYWJjIgplbmQKCnB1dHMgbWV0YWNsYXNzLmNsYXNz