(1) Lemma 5.2
  random pairs: 400 (with L < 7 or N - L < 7: 298)  largest N * |c - lambda c1 - (1-lambda) c2| = 6 <= 96
  vertex grid (0,0) : pair (Fraction(0, 1), Fraction(0, 1))
  vertex grid (1/5,8/5) : pair (Fraction(1, 5), Fraction(8, 5))
  vertex grid (3/8,3/2) : pair (Fraction(3, 8), Fraction(3, 2))
  vertex grid (1,0) : pair (Fraction(1, 1), Fraction(0, 1))
(2) the sides of Q: mixtures of two vertex grids, lambda = 1/4, 1/2, 3/4, N = 240 and 480
  (0,0) -- (1/5,8/5), lambda = 1/2, N = 480: pair (1/10, 4/5), target (1/10, 4/5), N * error = 0
  (1/5,8/5) -- (3/8,3/2), lambda = 1/2, N = 480: pair (23/80, 7411/4800), target (23/80, 31/20), N * error = 29/10
  (3/8,3/2) -- (1,0), lambda = 1/2, N = 480: pair (11/16, 359/480), target (11/16, 3/4), N * error = 1
  (0,0) -- (1,0), lambda = 1/2, N = 480: pair (1/2, 1/80), target (1/2, 0), N * error = 6
  (0,0) -- (3/8,3/2), lambda = 1/2, N = 480: pair (3/16, 241/320), target (3/16, 3/4), N * error = 3/2
  (1/5,8/5) -- (1,0), lambda = 1/2, N = 480: pair (3/5, 319/400), target (3/5, 4/5), N * error = 6/5
(3) Corollary 1.5(c)
  all three-letter grids of 11 small shapes: 115587  largest TV/delta: 1
  random grids with three or four letters: 600
  five-queens grids with 1..4 changed cells: 400  largest TV/delta: 2/5  largest gamma/delta: 12/35
  10x10 lattice grid with one foreign letter on a B-cell: delta = 3/80, TV = 1/100, TV/delta = 4/15
  20x20 lattice grid with one foreign letter on a B-cell: delta = 3/320, TV = 1/400, TV/delta = 4/15
  30x30 lattice grid with one foreign letter on a B-cell: delta = 1/240, TV = 1/900, TV/delta = 4/15
  (the constant 9002/15 = 600.1 of the note is far from these ratios; it is not claimed to be optimal)
RESULT PASS
