s = <<DATA
PLAY RECAP   *********************************************************************
ec2-123.compute-1.amazonaws.com : ok=16   changed=2    unreachable=0    failed=0   
ec2-456.compute-1.amazonaws.com : ok=11   changed=0    unreachable=0    failed=0   
ec2-766.compute-1.amazonaws.com : ok=40   changed=15   unreachable=0    failed=0   
localhost                  : ok=0    changed=0    unreachable=0    failed=0  
DATA
res = s
		.scan(/^(ec[0-9]+\S+) : ok=([0-9]+)/)
		.to_h.map{ |a, b| [ a,
                            begin
                              Integer b
                            rescue ArgumentError
                              b
                            end ]}
		.sort_by {|a, b| b}
		.to_h
puts res