PROGRAMMING:Who will stay? The rules are as follows: all the students form a circle, number in sequence, start counting from the first student, and those who report a fixed number (e.g. 5) will quit until only one student is left.

Every student wants to be the one who is left behind. Please program and calculate, in the first row when the number of the first row to become the last person to be left. The number of known students (< = 50).
###Input example:
```in
50 5
```
###Output example:
```out
nineteen
```







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