#! ruby

A = gets.chomp
B = gets.chomp

h = Hash.new 0

A.each_char do |c|
    h[c] += 1
end

B.each_char do |c|
    h[c] -= 1
end

if h.all?{|k,v| v == 0}
    puts "YES"
else
    puts "NO"
end