Compare two strings to see if there is a subset

two_strings_problem.rb

#!/bin/ruby

require 'json'
require 'stringio'
require 'set'

# Complete the twoStrings function below.
#s1, s2: two strings to analyze . 
def twoStrings(s1, s2)

    set1 = Set.new
    set2 = Set.new

    s1.each_char { |c| set1 << c}
    s2.each_char { |c| set2 << c}

    s3 = set1 & set2

    s3.empty? ? 'NO' : 'YES' 
   
end

fptr = File.open(ENV['OUTPUT_PATH'], 'w')

q = gets.to_i

q.times do |q_itr|
    s1 = gets.to_s.rstrip

    s2 = gets.to_s.rstrip

    result = twoStrings s1, s2

    fptr.write result
    fptr.write "\n"
end

fptr.close()