How to find blocked friend on line? and Unblock them back

I use to block friend in Line and I want to unblock them back. Yes, it might be crazy but I did this.

If you unblock and then uninstall, you might difficult then you just block them without uninstall the line from your phone.

If you are not uninstall, and you ever have communicate with them, you just go to sms and click the profile then unblock.

But if you uninstall line and then install it back. It might be difficult. But those friend ever like your status then it is the good chance for you. Just go to those status and then click their name. So now click unblock.