X's

Malcolm X's autobiography was so captivating.

Malcolm X's autobiography is a really powerful book.

You can play Go on a sheet of paper by drawing a grid and marking O's and X's on the intersections as you play.

A tic-tac-toe game is usually played with X's and O's.

This sentence employs two a's, two c's, two d's, twenty-eight e's, five f's, three g's, eight h's, eleven i's, three l's, two m's, thirteen n's, nine o's, two p's, five r's, twenty-five s's, twenty-three t's, six v's, ten w's, two x's, five y's, and one z.

He felt inspired and motivated after reading Malcom X's autobiography.