PROGRAMMING:Function returns the inverse ordinal of an integer

Write a function to return the inverse ordinal of a formal parameter (a positive integer). The main function is: input an integer n, output the inverse ordinal of n.
###Input example:
```in
twenty-one thousand
```
###Output example:
```out
twelve
```
###Input example:
```in
one thousand two hundred and thirty-four
```
###Output example:
```out
four thousand three hundred and twenty-one
```







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