Slide 32 of 71
Notes:
The XOR operation truth table is shown here. If you perform an exclusive OR operation on two zeroes, the result is zero. A zero XORed with a one yields one. A one XORed with zero yields one. And a one XORed with a one yields a zero. If you perform an XOR on the top number (1101001) with one of the middle numbers (like 0000100) you get one of the seven adjacents that differ from 1101001 by one digit only. (1101101)
