PROGRAMMING:T series rabbit
Uncle WW has lost his job recently. He heard that selling pets makes a lot of money!!!!! So, uncle WW decided to keep pet rabbits, but Uncle WW encountered a problem. Uncle WW found that a pair of little rabbits had a pair of little rabbits every month after three months. In order to make every little rabbit have enough living space, uncle WW needed to know the number of little rabbits every month.
###Input format:
There are several groups of input data, each group occupies one line, and N is input for each line (0 < = n < 40)
###Output format:
For each group of input data, output the logarithm of rabbits.
###Input example:
Here is a set of inputs. For example:
```in
0
one
two
three
four
five
```
###Output example:
The corresponding output is given here. For example:
```out
one
one
one
two
three
four
```
answer：If there is no answer, please comment
###Input format:
There are several groups of input data, each group occupies one line, and N is input for each line (0 < = n < 40)
###Output format:
For each group of input data, output the logarithm of rabbits.
###Input example:
Here is a set of inputs. For example:
```in
0
one
two
three
four
five
```
###Output example:
The corresponding output is given here. For example:
```out
one
one
one
two
three
four
```
answer：If there is no answer, please comment