def t(x)rand(2)==0?x.upcase: x+['','\'','2'][rand(3)]end
puts (0..15).map{|i|i%2==0?t("r"):t("u")}*" "

def t
define the function t

rand(2)
pick a random number from 0,1

==0?x.upcase: x
if the number is 0, turn the letter uppercase, if not leave as is

+
join onto this

['','\'','2']
create a list of the possible modifiers

[rand(3)]
pick a random one

puts
print to the screen

(0..15).map{|i|
from 0 to 15, do this ...

i%2==0?t("r"):t("u")
if the number is divisble by 2, call the function t with "r", if not, call it with "u"

}*" "
make that into a piece of text, seperated by " "