```
2)
Allowed characters allows not ASCII upcased characters at the beginning ERROR
NoMethodError: undefined method `ἍBB' for #<Module:0x17bffc17>
(eval):1:in `<main>'
org/jruby/RubyKernel.java:1048:in `eval'
/Users/headius/projects/jruby/spec/ruby/language/constants_spec.rb:742:in `block in <main>'
org/jruby/RubyBasicObject.java:2615:in `instance_eval'
org/jruby/RubyEnumerable.java:1862:in `all?'
org/jruby/RubyArray.java:1809:in `each'
/Users/headius/projects/jruby/spec/ruby/language/constants_spec.rb:715:in `<main>'
org/jruby/RubyKernel.java:1009:in `load'
org/jruby/RubyBasicObject.java:2615:in `instance_eval'
org/jruby/RubyArray.java:1809:in `each'
```