PROGRAMMING:Calculate water charge

The gradient charge system is adopted for the tap water in a residential area. When a household uses less than 10 cubic meters of tap water (including 10 cubic meters), the charge for each cubic meter of tap water is 2 yuan; When users use more than 10 cubic meters of tap water, the cost of the excess is 3 yuan per cubic meter.
###Input format:
Enter an integer greater than or equal to 0 and less than or equal to 100
###Output format:
Cost of direct export of tap water
###Input example:
Here is a set of inputs. For example:
```in
nine
```
###Output example:
The corresponding output is given here. For example:
```out
eighteen
```
###Input example:
Here is a set of inputs. For example:
```in
ten
```
###Output example:
The corresponding output is given here. For example:
```out
twenty
```
###Input example:
Here is a set of inputs. For example:
```in
eleven
```
###Output example:
The corresponding output is given here. For example:
```out
twenty-three
```






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