1aa76a5226
Add plot_breaker_tile.py and figure for word=UUUDUDUDUDUD bite=(3,11): structure (7 up teeth = size-7 outer rim, bite (3,11), singleton downs d5,d7,d9) plus a Kempe-balanced colouring. Reconfirms the outer rim realises 9/10 admissible size-7 necklaces, never 0001112 -- the lone tile that empties the size-7 universal at n=12. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>