PROGRAMMING:The prime number of the nth smallest
###Task description
Input a positive integer P and output the smallest prime number from 2, that is, the p-th value in the prime number sequence.
###Input format:
A positive integer P not exceeding 10000.
###Output format:
Output a prime number in a row.
###Input example:
```in
three
```
###Output example:
```out
five
```
###Input example:
```in
ten
```
###Output example:
```out
twenty-nine
```
###Title Source
This topic is selected from openjudge website http://noi.openjudge.cn/ch0105/44/
answer：If there is no answer, please comment
Input a positive integer P and output the smallest prime number from 2, that is, the p-th value in the prime number sequence.
###Input format:
A positive integer P not exceeding 10000.
###Output format:
Output a prime number in a row.
###Input example:
```in
three
```
###Output example:
```out
five
```
###Input example:
```in
ten
```
###Output example:
```out
twenty-nine
```
###Title Source
This topic is selected from openjudge website http://noi.openjudge.cn/ch0105/44/
answer：If there is no answer, please comment