Map is a built-in filter that has similar functionality to the map() function in Python. It applies a filter to a sequence.
For example, to apply a filter called double which as the name suggests doubles the number of each member of a list, we can use map as follows:
{{ our_list|map('double') }}
join is another built-in filter that joins the member of the lists it is applied to.
{{ [1,0,0,1] | join(".") }} results in "1.0.0.1"
Use both filters: map, lower, and join to lowercase each element of the following list and join them into a single string separated by a comma
lang_list = ["PYTHON","JAVA","HASKELL"]
The result should be
'python, java, haskell'
Put your answer inside the template of render_template