de-merphq,
...I think you can simplify the grep a little

I thought about that too at first but it is flawed thinking. If a letter appears more than once then it can go from 0 to a negative number which will again start returning true values. The intention was to only produce a unique list.

Cheers - L~R

In reply to Re^2: Unique List of Common Characters Between Two Strings by Limbic~Region
in thread Unique List of Common Characters Between Two Strings by Limbic~Region

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