```
cat /etc/group | grep wheel
wheel:x:10:I0173203,i04317303,raccount,d454523,c564566,C555533,D2354546

```

I want to extract only the users that start with `c\C i\I d\D`

How do I get this Desired output?

```
I0173203 i04317303 d454523 c564566 C555533 D2354546

```