Calculate the date of meetups.
Typically meetups happen on the same day of the week. In this exercise, you 
will take a description of a meetup date, and return the actual meetup date.
Examples of general descriptions are:
<ul>
<li>The first Monday of January 2017</li>
<li>The third Tuesday of January 2017</li>
<li>The wednesteenth of January 2017</li>
<li>The last Thursday of January 2017</li>
</ul>
The descriptors you are expected to parse are: 
first, second, third, fourth, fifth, last, monteenth, tuesteenth, wednesteenth, 
thursteenth, friteenth, saturteenth, sunteenth
Note that "monteenth", "tuesteenth", etc are all made up words. There was a 
meetup whose members realized that there are exactly 7 numbered days in a month 
that end in '-teenth'. Therefore, one is guaranteed that each day of the week 
(Monday, Tuesday, ...) will have exactly one date that is named with '-teenth' 
in every month.
Given examples of a meetup dates, each containing a month, day, year, and 
descriptor calculate the date of the actual meetup. For example, if given 
"The first Monday of January 2017", the correct meetup date is 2017/1/2.

Meetup