In the magnetic storage device, three attempts are made to read data before error recovery procedure that repositions the magnetic head is used. The error recovery procedure attempts three repositionings before an "abort" message is sent to the operator. Let s denote the success of the read operation, f denote the failure of read operation, F denote the failure of an error recovery, S denote a success of an error recovery, and A denote an abort message. Describe the sample space of the experiment with a diagram.