PROGRAMMING:Fahrenheit to centigrade
Input a Fahrenheit temperature and output a centigrade temperature. The conversion formula is: C = 5 (f-32) / 9.
###Input format:
Enter a Fahrenheit value.
###Output format:
Output temperature in centigrade.
###Input example:
```in
ninety-six
```
###Output example:
```out
thirty-five point five five five five five seven
```
answer：If there is no answer, please comment
###Input format:
Enter a Fahrenheit value.
###Output format:
Output temperature in centigrade.
###Input example:
```in
ninety-six
```
###Output example:
```out
thirty-five point five five five five five seven
```
answer：If there is no answer, please comment