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please help pearl program

Separate, count and sort the words in the example text file, electricity.txt (see link at the class homepage). Sort in the following orders and your output should be nicely lined up in columns to the output file.

1. alphabetically (ignoring capitalization),

2. alphabetically with upper case words just in front of lower case words with the same initial characters

3. by frequency, from high to low, (any order for equal frequency)

4. by frequency, with alphabetical order for words with the same frequency



start of electricity.txt

Here is a dissertation on physical science for your enlightenment.

I don't know where it came from so it must be true!


[ Update: This appears to have come from Dave Barry, and the same text

 can be found as:


 http://www.uk.research.att.com/~fms/electricity.html

 http://rachel.albany.edu/~jc9334/barry1.html


 and many other places on the web. I'd check with Dave, but he

 doesn't respond to email any more (and life's too short for snail

 mail) ]

.....................................................................



Today's scientific question is: What in the world is electricity and

where does it go after it leaves the toaster?


Here is a simple experiment that will teach you an important

electrical lesson: On a cool dry day, scuff your feet along a carpet,

then reach your hand into a friend's mouth and touch one of his dental

fillings. Did you notice how your friend twitched violently and cried

out in pain? This teaches one that electricity can be a very powerful

force, but we must never use it to hurt others unless we need to learn

an important lesson about electricity.


It also illustrates how an electrical circuit works. When you scuffed

your feet, you picked up batches of "electrons", which are very small

objects that carpet manufacturers weave into carpet so that they will

attract dirt. The electrons travel through your bloodstream and

collect in your finger, where they form a spark that leaps to your

friend's filling, then travel down to his feet and back into the

carpet, thus completing the circuit.


AMAZING ELECTRONIC FACT: If you scuffed your feet long enough without

touching anything, you would build up so many electrons that your

finger would explode! But this is nothing to worry about unless you

have carpeting.


Although we modern persons tend to take our electric lights, radios,

mixers, etc. for granted, hundreds of years ago people did not have

any of these things, which is just as well because there was no place

to plug them in. Then along came the first Electrical Pioneer,

Benjamin Franklin, who flew a kite in a lightning storm and received a

serious electrical shock. This proved that lightning was powered by

the same force as carpets, but it also damaged Franklin's brain so

severely that he started speaking only in incomprehensible maxims,

such as, "A penny saved is a penny earned." Eventually he had to be

given a job running the post office.


After Franklin came a herd of Electrical Pioneers whose names have

become part of our electrical terminology: Myron Volt, Mary Louise

Amp, James Watt, Bob Transformer, etc. These pioneers conducted many

important electrical experiments. Among them, Galvani discovered

(this is the truth) that when he attached two different kinds of metal

to the leg of a frog, an electrical current developed and the frog's

leg kicked, even though it was no longer attached to the frog, which

was dead anyway. Galvani's discovery led to enormous advances in the

field of amphibian medicine. Today, skilled veterinary surgeons can

take a frog that has been seriously injured or killed, implant pieces

of metal in its muscles, and watch it hop back into the pond --

almost.


But the greatest Electrical Pioneer of them all was Thomas Edison, who

was a brilliant inventor despite the fact that he had little formal

education and lived in New Jersey. Edison's first major invention in

1877 was the phonograph, which could soon be found in thousands of

American homes, where it basically sat until 1923, when the record was

invented. But Edison's greatest achievement came in 1879 when he

invented the electric company. Edison's design was a brilliant

adaptation of the simple electrical circuit: the electric company

sends electricity through a wire to a customer, then immediately gets

the electricity back through another wire, then (this is the brilliant

part) sends it right back to the customer again.


This means that an electric company can sell a customer the same batch

of electricity thousands of times a day and never get caught, since

very few customers take the time to examine their electricity closely.

In fact, the last year any new electricity was generated was 1937.


Today, thanks to men like Edison and Franklin, and frogs like

Galvani's, we receive almost unlimited benefits from electricity. For

example, in the past decade scientists have developed the laser, an

electronic appliance so powerful that it can vaporize a bulldozer 2000

yards away, yet so precise that doctors can use it to perform delicate

operations to the human eyeball, provided they remember to change the

power setting from "Bulldozer" to "Eyeball."

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