Level 1. MAT, ACT, CAT, MATH, CHAT, MATCH, MAC
Level 2. ELK, EEL, KNEE, LEEK, KEEL, KEEN, KNEEL
Level 3. HIS, ASH, ISAIAH
Level 4. TIRE, RITE, BITE, BRIT, BITTER, TIER
Level 5. FUSE, SELF, FLUE, USEFUL, FUEL
Level 6. PAW, MAP, SWAP, SPAM, SWAMP, WASP
Level 7. EACH, CANE, ACHE, CHANCE, CACHE
Level 8. SPIN, SHIP, PUSH, PUNISH, UNSHIP
