Example 1: a letter into the middle
- Step 1: Cover each letter of 'bread': read, bead, brad, bred, brea. 'Read', 'bead' and 'bred' are real words, so the letter could be b, r or a.
- Step 2: Try b in 'cow': bcow, cbow, cobw, cowb. None are words.
- Step 3: Try r in 'cow': rcow, crow… 'crow' is a word, and 'bead' is left behind.
Answer: r (bead and crow)