Interpolation uses #{...}. Slice with [0, 3]. include? asks.

Goal

Build a kiosk line with interpolation.

city = "Nairobi"
puts "Kiosk in #{city}"

s = "Mombasa"
puts s.length
puts s[0, 3]
puts s.include?("bas")

puts "Nakuru".upcase
puts "  Eldoret  ".strip

puts "Nairobi" < "Mombasa"
puts "Nairobi" + " / " + "Kisumu"