It only uses four different letters. It uses a total of 7 letters because the A is used 4 times. So 4 different letters and the A used 3 more times than that.
What word uses letters alosetkfcctw
MATZOHS uses those letters.
Computer uses all the letters.
people
Algebra uses letters called variables
Those letters spell deacon.
Photon uses all the letters
Those letters spell "usher".
The letters spell a choosy. The word uses all 6 letters.
The letters spell the word ignoble. It uses all seven letters.
The letters spell the word unique. It uses all six letters.