This example is from the description:

Input: [0, 1, 0, 0, 1, 1, 0]

Output: "mon, thu and Fri"

If we are supposed to put "close" days first, then why is the output "mon, thu and Fri" but not "thu, fri and mon"?

Borrowed this example from anter69:

Input: [1, 0, 0, 1, 1, 0, 1]: 'sun, wed, thu and sat' should equal 'sat, sun, wed and thu'

I think this case needs more clarification.

There are two pairs of "close" days. So what makes the answer "sat, sun, wed and thu" but not "wed, thu, sat and sun"?