Redundancy

Solution

The grid contains 26 columns, indicating that each column can be filled with the corresponding letter. Four letters are marked in each row, three of which can spell a “word” from Alphabet. The remaining letters in each row spell the solution word.

Marked LettersAlphabet WordRemaining Letter
EQSWQEWS
ISTVVSIT
DKPUPKDU
DJLTTJLD
DHUYHDUY

STUDY