#!/usr/bin/env ruby

def sieve(num);

      n = num;
      array_seed = [];

      while n > 1 do
   　　　　　array_seed << n;
　　　   　　n -= 1;
      end

      array_seed.reverse!;
      primes = [];

      while true do
　　　   　　array_seed_tmp = array_seed.shift;
　　　　　   primes << array_seed;

           break if !array_seed_tmp

           trashnum = [];

           array_seed.each do |x|
               trashnum << x; if x % array_seed_tmp == 0
           end
         primes -= trashnum
　    end
      array_string = primes.to_s;
      array_string.each do |y|
         print("#{y}s");
      end
    end
end

psieve.rb(main):001:0> #!/usr/bin/env ruby
=> nil
psieve.rb(main):002:0>
psieve.rb(main):003:0> def sieve(num);
psieve.rb(main):004:1>
psieve.rb(main):005:1>       n = num;
psieve.rb(main):006:1>       array_seed = [];
psieve.rb(main):007:1>
psieve.rb(main):008:1>       while n > 1 do
psieve.rb(main):009:2*    　　　　　array_seed << n;
psieve.rb(main):010:2> 　　　   　　n -= 1;
psieve.rb(main):011:2>       end
psieve.rb(main):012:1>
psieve.rb(main):013:1>       array_seed.reverse!;
psieve.rb(main):014:1>       primes = [];
psieve.rb(main):015:1>
psieve.rb(main):016:1>       while true do
psieve.rb(main):017:2* 　　　   　　array_seed_tmp = array_seed.shift;
psieve.rb(main):018:2> 　　　　　   primes << array_seed;
psieve.rb(main):019:2>
psieve.rb(main):020:2>            break if !array_seed_tmp
psieve.rb(main):021:2>
psieve.rb(main):022:2>            trashnum = [];
psieve.rb(main):023:2>
psieve.rb(main):024:2>            array_seed.each do |x|
psieve.rb(main):025:3*                trashnum << x; if x % array_seed_tmp == 0
psieve.rb(main):026:4>            end
psieve.rb(main):027:3>          primes -= trashnum
psieve.rb(main):028:3> 　    end
psieve.rb(main):029:2>       array_string = primes.to_s;
psieve.rb(main):030:2>       array_string.each do |y|
psieve.rb(main):031:3*          print("#{y}s");
psieve.rb(main):032:3>       end
psieve.rb(main):033:2>     end
psieve.rb(main):034:1> end
=> :sieve
psieve.rb(main):035:0>
psieve.rb(main):036:0>

#!/usr/bin/env ruby

def sieve(num);

      n = num;
      array_seed = [];

      while n > 1 do
   　　　　　array_seed << n;
　　　   　　n -= 1;
      end

      array_seed.reverse!;
      primes = [];

      while true do
　　　   　　array_seed_tmp = array_seed.shift;
　　　　　   primes << array_seed;

           break if !array_seed_tmp

           trashnum = [];

           array_seed.each do |x|
               trashnum << x; if x % array_seed_tmp == 0
           end
         primes -= trashnum
　    end
      array_string = primes.to_s;
      array_string.each do |y|
         print("#{y}s");
      end
    #end
end

psieve.rb(main):001:0> #!/usr/bin/env ruby
=> nil
psieve.rb(main):002:0>
psieve.rb(main):003:0> def sieve(num);
psieve.rb(main):004:1>
psieve.rb(main):005:1>       n = num;
psieve.rb(main):006:1>       array_seed = [];
psieve.rb(main):007:1>
psieve.rb(main):008:1>       while n > 1 do
psieve.rb(main):009:2*    　　　　　array_seed << n;
psieve.rb(main):010:2> 　　　   　　n -= 1;
psieve.rb(main):011:2>       end
psieve.rb(main):012:1>
psieve.rb(main):013:1>       array_seed.reverse!;
psieve.rb(main):014:1>       primes = [];
psieve.rb(main):015:1>
psieve.rb(main):016:1>       while true do
psieve.rb(main):017:2* 　　　   　　array_seed_tmp = array_seed.shift;
psieve.rb(main):018:2> 　　　　　   primes << array_seed;
psieve.rb(main):019:2>
psieve.rb(main):020:2>            break if !array_seed_tmp
psieve.rb(main):021:2>
psieve.rb(main):022:2>            trashnum = [];
psieve.rb(main):023:2>
psieve.rb(main):024:2>            array_seed.each do |x|
psieve.rb(main):025:3*                trashnum << x; if x % array_seed_tmp == 0
psieve.rb(main):026:4>            end
psieve.rb(main):027:3>          primes -= trashnum
psieve.rb(main):028:3> 　    end
psieve.rb(main):029:2>       array_string = primes.to_s;
psieve.rb(main):030:2>       array_string.each do |y|
psieve.rb(main):031:3*          print("#{y}s");
psieve.rb(main):032:3>       end
psieve.rb(main):033:2>     #end
psieve.rb(main):034:2> end
psieve.rb(main):035:1>
psieve.rb(main):036:1>
SyntaxError (psieve.rb:35: syntax error, unexpected end-of-input, expecting end)
    from /usr/lib/ruby/gems/2.6.0/gems/irb-1.0.0/exe/irb:11:in `<top (required)>'
    from /usr/bin/irb:23:in `load'
    from /usr/bin/irb:23:in `<main>'

#!/usr/bin/env ruby

def sieve(num)

        n = num;
        array_seed = [];

        while n > 1 do
                array_seed << n;
                n -= 1;
        end

        array_seed.reverse!;
        primes = [];

        while true do
                array_seed_tmp = array_seed.shift;
                primes << array_seed;

                break if !array_seed_tmp

                trashnum = [];

                array_seed.each do |x| trashnum << x;
                        if x % array_seed_tmp == 0
                        end
                        primes -= trashnum
                end
                array_string = primes.to_s;
                array_string.each do |y|
                        print("#{y}s");
                end
        end
end