# Exercises

Answer the following questions (or at least as many as you can figure out) in this document. 
For all the questions, use the 100k words. Give your answer for each exercise, and 
show the command you used to get it. Each question can be answered using a single Terminal 
command, though you might need to use a number of pipes. 

If you want to be really stylish, put your code inside of backticks like this: 

`cat words_100k.txt | length | put 10 | equal | count`

## 1. What is the longest word?
cat words_100k.txt | length | order
    28 antidisestablishmentarianism
        also you can use
            cat words_100k.txt | length | order | tail

## 2. How many words have two u's in a row?
cat words_100k.txt | match "uu" | count
    16 words that have two "u's"
        you can also use, but you have to count the lines
            cat words_100k.txt | match "uu"

## 3. How many words have the word "cat" in them?
cat words_100k.txt | match "cat" | count
    893 words have the word "cat"

## 4. How many words have all five vowels (aeiou)?
cat words_100k.txt | match "a.*e.*i.*o.*u" | count
    8 words have all five vowels (aeiou)

## 5. Which words have two l's in a row, two m's in a row, and two t's in a row? (they don't have to be in that order)
Corrected. Needed to use file, words_370k.txt
cat words_370k.txt | match "ll" | match "tt" | match "mm"
    noncommittally

Used incorrect file, words_100k.txt. Nothing printed out, no error messages in terminal.
cat words_100k.txt | match "l.+l.+m.+m.+t.+t"
cat words_100k.txt | match "ll.+mm.+tt"
cat words_100k.txt | match "l.*l.*m.*m.*t.*t"
        There are no words that have two l's, two m's, and two t's each in a row
        If using a match separately for each set of the "letters in a row," then a lot of words will match the criteria.
    cat words_100k.txt | match "ll" | match "mm"
    cat words_100k.txt | match "mm" 
    cat words_100k.txt | match "tt"
    cat words_100k.txt | match "ll" | match "tt"
    cat words_100k.txt | match "ll" | match "tt" | match "mm"

    

## 6. How many words have sixteen or more letters?
cat words_100k.txt | length | order | put 16 | lessthan 0 1 -e | count
    696 words have sixteen or more letters

    ?? How is the lessthan 0 1 -e" counting the order of 16 or more letters in a word?
    It's considered less than or equal to? It looks like it's doing the opposite. Abstract.

Breaking  down to simplier methods trying to solve the larger problem

cat words_100k.txt | length | order   1
    1 word with: 28 letters max
cat words_100k.txt | length | put 16 | equal | count  354
cat words_100k.txt | length | put 17 | equal | count  207
cat words_100k.txt | length | put 18 | equal | count  67
cat words_100k.txt | length | put 19 | equal | count  45
cat words_100k.txt | length | put 20 | equal | count  16
cat words_100k.txt | length | put 21 | equal | count  1
cat words_100k.txt | length | put 22 | equal | count  3
cat words_100k.txt | length | put 23 | equal | count  2
cat words_100k.txt | length | put 24 | equal | count  0
cat words_100k.txt | length | put 25 | equal | count  0
cat words_100k.txt | length | put 26 | equal | count  0
cat words_100k.txt | length | put 27 | equal | count  0
cat words_100k.txt | length | put 28 | equal | count  1

## 7. What's the most frequent 10-letter word?
cat words_100k.txt | length | put 10 | equal | count
    9869

## 8. What's the longest word which doesn't have any repeated letters?
This is correct...
cat words_100k.txt | length | unique 1 | length | equal 0 2 | order
        13 abcdeilnprtuy 13 unpredictably
        13 abceghiloprty 13 copyrightable
        13 abceilmnoprtu 13 unproblematic
        13 abegiklmnortu 13 troublemaking
        13 acegilmnopsty 13 salpingectomy

## 9. What's the longest word which only uses four different letters?
Corrected
cat words_100k.txt | unique |length |put 4 |equal |pluck 3 |length |order
re-read this and write about it..
Prints out all unique letters with 4-letter words with the length in alphabetical order 
    Note: pluck 3 - selects just the word at index 3

Tried this, error message. Thinking 4 unique letters
How do I change the length to sort "4" unique letters?
    cat words_100k.txt | length | unique 1 | length | order -r | head
         Scrolled up to see longest word, elns, 13 senselessness
    cat words_100k.txt | length | unique 1 | length | order -r | head
    cat words_100k.txt | unique
    cat words_100k.txt | unique | length

## 10. If you rearrange the letters in "sidebar," what other words can you create?
cat words_100k.txt | match "s.*i.*d.*e.*b.*a.*r"
    sidebar
    sideboard
    sideboards
