How does the robot get out?

Here is the program. It is written in the right order.
Please fill in the numbers.

1) Step forward --> go to ..
2) Feel forward --> go to ..
3) IF wall: turn left --> go to ..
    ELSE --> go to ..
4) Feel forward --> go to ..
5) IF wall turn left --> go to ..
    ELSE --> go to ..
6) Step forward --> go to ..
7) Feel right --> go to ..
8) IF no wall, turn right, step forward, end program
    ELSE --> go to ..

There is one instance in which this program fails. Which is it?