An algorithm is used to troubleshoot a smart home thermostat. The pseudocode for this algorithm is shown below:

1  OUTPUT 'Is the green LED flashing?'
2  response ← USERINPUT
3  IF response = 'yes' THEN
4      OUTPUT 'Is the router connected to the Internet?'
5      response ← USERINPUT
6      IF response = 'no' THEN
7          OUTPUT 'Replace device'
8      ELSE
9          OUTPUT 'Restart the router'
10     ENDIF
11 ELSE
12     OUTPUT 'Is the power cable damaged?'
13     response ← USERINPUT
14     IF response = 'yes' THEN
15         OUTPUT 'Replace device'
16     ELSE
17         OUTPUT 'Plug into a different socket'
18     ENDIF
19 ENDIF

The phrase 'Replace device' appears twice in this algorithm.