Count every “F” in the
following text:

FINISHED FILES ARE THE
　RESULT OF YEARS OF
　　SCIENTIFIC STUDY
　　COMBINED WITH
　THE EXPERIENCE OF
　　　　　YEARS…

If you count three on the first go, you’re normal.
Four is rare.
Six is a genius.

人間、機能語のofに注意を払わないようです。
内容語に目が行くのは当然なので。