S=90

for k in range (9,32):

S=S-2

print(S)

The code you provided will subtract 2 from the variable "S" in each iteration of the loop, starting from 9 and ending at 31. Here is the updated code with correct indentation:

```
S = 90
for k in range(9, 32):
S = S - 2
print(S)
```

The output of this code will be 34.