My teacher always gives me the most complicated set of math problems for homework. Like: `pg. 546: 17-19, 22, 26, pg. 548: 35-67 odd, 79, 80-86 even`. And I want to know in advance how much time to set aside for my homework, but I don't want to have to figure all that out. That's why its your task to program it for me.

##Specifications

- You will get a string detailing the problems that I have to complete as args, stdio, etc.
- They will be comma separated (possibly `commma-space` separated)
- It will include single problems in the form of just a number (e.g. `79`)
- And ranges in the form `17-18` (again, you have to deal with optional spaces)
- The ranges are inclusive of both ends
- The ranges will optionally be suffixed by `odd` or `even`, which you have to take into account.
- A set of ranges/pages will be prepended by a page number in the form `pg. 545: `, again having to deal with optional spaces. You can safely ignore these, as you need to get the problems over all the pages
- The text may be in uppercase or lowercase, but will not be both.
- Return, stdout, etc. the number of problems I have to do for homework.
- Since this is [tag:code-golf], shortest code in bytes wins!

##Test Cases

	pg. 546: 17-19, 22, 26, pg. 548: 35-67 odd, 79, 80-86 even   ->    27
	pg. 34: 1                                                    ->    1
	PG. 565: 2-5,PG.345:7                                        ->    5
	pg. 343: 5,8,13 - 56 even,pg. 345: 34 - 78,80                ->    70