PROGRAMMING:Calculating factorial n!
Given 1 integer N , you are supposed to output the factorial of n ( `n!`) .
### Input Specification:
input a integer in a line. The number are no more than 1000.
### Output Specification:
For each test case, print in a line the value of `n!`.
### Sample Input:
```in
five
```
### Sample Output:
```out
one hundred and twenty
```
answer：If there is no answer, please comment
### Input Specification:
input a integer in a line. The number are no more than 1000.
### Output Specification:
For each test case, print in a line the value of `n!`.
### Sample Input:
```in
five
```
### Sample Output:
```out
one hundred and twenty
```
answer：If there is no answer, please comment