PROGRAMMING:Loop structure - 10 characters

Input 10 characters, if all capital letters, output perfect; If all lowercase letters, output good; If it is all digital, output nice. If the first three cases do not meet the output OK
###Input format:
Enter 10 characters
###Output format:
If all capital letters, output perfect;
If all lowercase letters, output good;
If all are digital, output nice;
If the first three cases do not meet the output requirements, OK
###Input example:
Here is a set of inputs. For example:
```in
ABCDEFGHWN
```
###Output example:
The corresponding output is given here. For example:
```out
perfect
```







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