Reconcile

Reconciling something seems to be boring, sometimes. But the procedure requires understanding on the things; it means that if you don't have sufficient knowledge for the thing, you cannot find the correspondence between two things.

Also, this procedure requires the ability of concentration. Reconciling more than a hundred items in two different list is absolutely tough.

As a result, I mean that the one who can reconcile something have the ability higher than some level. That is to say that you mustn't ask this procedure to someone who don't have the abilities.