PROGRAMMING:Calculate the temperature in centigrade

Given a Fahrenheit temperature $$f $$, this problem requires the preparation of procedures to calculate the corresponding centigrade temperature $$C $$. Calculation formula: $$C = 5 times (f-32) / 9 $$. Ensure that the input and output are in the range of integer.
###Input format:
The input gives a Fahrenheit temperature on one line.
###Output format:
In one line, output the integer value of the corresponding centigrade temperature C according to the format "Celsius = C".
###Input example:
```in
one hundred and fifty
```
###Output example:
```out
Celsius = 65
```






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