Level 1. CAB, BABY, CABBY, BAY
Level 2. SIT, THIS, STIR, SHIRT, HIT
Level 3. RING, GRIN, VIRGIN, RIG
Level 4. YEAR, WEAR, WEARY, WARY
Level 5. LIP, PULL, PILL, HILL, UPHILL
Level 6. THIS, RICH, CHRIST, ITCH
Level 7. NAG, EGG, AGE, ENGAGE, GANG
Level 8. DAY, ANT, TINY, TIDY, ANY, DAINTY
