Level 1. SALE, CASE, SCALE, LACE
Level 2. PIN, HIP, INCH, CHIP, CHIN, PINCH, NIP
Level 3. LAM, LAB, LAMB, BALAAM
Level 4. NIT, TIN, ANT, FAN, INN, INFANT, TAN
Level 5. TEA, SET, TEST, SEAT, TASTE, STATE, EAST
Level 6. TIP, SIT, ITS, TRIP, SPIT, STRIP, SPIRIT, STIR
Level 7. THINK, NIGHT, KNIGHT, THING
Level 8. FROM, MORE, FORE, FORM, FORMER, REFORM
