Due Mon Sep 16 at 4pm

Read a file called instructions.txt.
That file with have 
	a filename on the first line
	one or more addtional lines with three numbers on each line, then a letter.
	Those numbers are a line number, the starting position, and the ending position.
	The letter is either an 'f' or an 'r', for reverse or forward.

Open the filename you were given.  For each line from the instructions, print as required.
If any number is out of bounds, ignore the whole line.
When the intruction file ends, call exit
Line number start with 1, not 0!
Character positions start with 1, not zero!

=====instructions.txt======
c:\Users\rappleto\Desktop\lyrics.txt
2 1 3 r
1 5 10 f
3 2 9653 r
=========End of instructions.txt=======


====lyrics.txt============
One is the loneliest number that you'll ever do
Two can be as bad as one
It's the loneliest number since the number one
No is the saddest experience you'll ever know
Yes, it's the saddest experience you'll ever know
Cause one is the loneliest number that you'll ever do
One is the loneliest number, whoa-oh, worse than two
It's just no good anymore since you went away
Now I spend my time just making rhymes of yesterday
Three Dog Night
======End of lyrics.txt=====


Expected output:
owT
is the