The same two letters, in the same, consecutive order, will change each word below into a new one. What are the letters and what are the new words?

1. STYE
2. HOLY
3. SLING
4. CHEST
5. PROSE

Answer:

The two letters are MI:

1. STYMIE
2. HOMILY
3. SMILING
4. CHEMIST
5. PROMISE

Credit:
Harvey Estes
COUNT MI IN