class SortFreely
    attr_reader :a, :b

    def initialize(a: "", b: "")
        @a, @b = a, b
    end

    def cause
        begin
            @a = gets.chomp
            @b = gets.chomp
        rescue
            
        end
    end

    def judgment(str1, str2)
        (str1.split("").sort == str2.split("").sort)? "YES" : "NO"
    end

    def result
        puts judgment(@a, @b)
    end

    def run
        cause
        result
    end
end

if $0 == __FILE__
    SortFreely.new.run
end