Visual discrimination exercise from Chicago Occupational Therapy, page 10, asking to find 10 instances of the letter combination "wnm" among similar-looking combinations.
Worksheet titled "Find 10 letter combinations that look the same as the one in the top box and circle them" with the target combination "wnm" and a grid of various letter combinations including "mnw", "mwn", "nmw", "wnm", etc.