Garbled Greek

Robert A. Guelich, Mark 1:1-8:26 (Dallas: Word Books, Publisher, ©1989 = Word Biblical Commentary, 34a), p. 148 (on Mark 3:11):

"You are the Son of God" (σὺ εἶὁ υἱὸς τοῦ όἀέῦ) has also been taken as an apotropaic gesture (see Comment on 1:24) identical to the unclean spirit's address of "Son of the Most High God" in 5:7.

Image from the book:

The Greek should read σὺ εἶ ὁ υἱὸς τοῦ θεοῦ.