Print frame around user input words or sentences - ruby

Question

I am doing a coding bootcamp and into week-2 and have learnt loop, methods, a bit of classes. I have come across with this coding challenge.
I can put a frame around the sentence I put in def method. I would like to know how I can put a frame around user input words. I have tried, but am getting an error.
Ultimately, what I want to achieve is to delete words = %w(This restaurant has an excellent menu - sushi ramen okonomiyaki.) from def method.
Thank you!!
puts "Welcome to frame with words."
puts "Enter your favourite quote or sentence or any word you like"
words = gets.chomp.to_s
def my_favourite words=[]
words = %w(This restaurant has an excellent menu - sushi ramen okonomiyaki.)
longest = 0
words.each {|word| longest = word.length if longest < word.length }
(0..longest+3).each {print "*"}
print "\n"
words.each do |word|
print "* "
print word
(0..longest-word.length).each { print " " }
print"*\n"
end
(0..longest+3).each {print"*" }
return
end
my_favourite
The type of output I want is below.
* This *
* restaurant *
* has *
* an *
* excellent *
* menu *
* - *
* sushi *
* ramen *
* okonomiyaki. *
**************** ```

Answer 1

Suppose
str = gets.chomp
#=> "This restaurant has an excellent menu - sushi ramen."
then
words = str.split
#=> ["This", "restaurant", "has", "an", "excellent", "menu", "-",
# "sushi", "ramen."]
width = words.max_by(&:size).size
#=> 10
top_bot = '*' * (width+4)
#=> "**************"
puts top_bot
words.each { |word| puts "* %-#{width}s *" % word }
puts top_bot
displays:
**************
* This *
* restaurant *
* has *
* an *
* excellent *
* menu *
* - *
* sushi *
* ramen. *
**************
words.max_by(&:size) is shorthand for:
words.max_by { |word| word.size }
#=> "restaurant"
See the doc Kernel#sprint for an explanation of the formatting codes in "* %-#{width}s *" % word. After #{width} is substitute out this becomes "* %-10s *" % word. s specifies that word is a string. 10 means it should occupy a field of width 10. - means that the string should be left-adjusted in the field. The field of width 10 is preceded by "* " and followed by " *", forming a string of width 14.
This could instead be (equivalently) written:
word = "balloon"
sprintf("* %-#{width}s *", word)
#=> "* balloon *"
See also String#split, Enumerable#max_by and String#*.