How to use element click selector inside element click selector


Letters (at the top) & groups (on the left side) are not "a" tags with href attribute.
Words (on the right side) are "a" tags with href attribute.
To scrape this i should click a letter (top) then click a group (left) then select links (right).
So i need link selector inside element click selector inside element click selector.
When i do that the following pop up appear

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