```
echo no lang
```

```sh
#!/bin/sh
echo triple backtick
valu=${aaa}
```

{%codeblock lang:c++%}
using namespace std;
for(int i=0;i<10;i++){
  std::cout << "codeblock" << std::endl;
}
{%endcodeblock%}

~~~ .ruby
puts "PHP Markdown Extra wave codeblock"
def func(flag)
  if(flag)
    puts "OK"
  else
    puts "FAILED"
  end
end
~~~