PROGRAMMING:Step into computer series (5) decimal to octal

Li is really an unsatisfied person. Now he wants to know how to convert decimal system to octal system
It seems that brother, continue to work hard!
###Input format:
Each line is a decimal number, which is guaranteed to be a positive integer
###Output format:
The octal number of corresponding decimal number is given
One result per line
###Input example:
Here is a set of inputs. For example:
```in
eight
```
###Output example:
The corresponding output is given here. For example:
```out
ten
```







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