Level 1. REC, ERE, HERE, CHEER, HER
Level 2. HOE, HEM, HOME, COME, ECHO
Level 3. PAIR, LIAR, APRIL, RAIL
Level 4. LEAD, GLAD, GALE, GLADE, DEAL
Level 5. EAR, CAR, ACE, RAVE, CAVE, CARE, CARVE
Level 6. HAM, RAM, CAR, ARC, MARCH, CHARM, ARM
Level 7. CUT, CULT, CLUTCH, HUT
Level 8. INN, NINE, ENGINE, GEN
