⌈⍋>2₆·⊆6*¯.∀&Ṗ˜Ẇ≤Ƀḟ₉z~Ḋ∇√r÷jn₁Ċf∨Z⁾^R×VᵝΘJNᴰB∊⌊ÇF⁶ḍŔ3²7∆+₄#⍪'Ṫεг⊏≢⊥σ{ṡsẎ₇ɓœoƤcg[SWK⊤₎OC≡GÆŒ¹8Ṡ<ᵠ±⁰0µ4₂⊂, Σ⍒ⁿḄ≠₍⊣⋈∞|pth₅Ďl`dXĴ\PᵂT⊢HLˀᶲD₈9=15´¨-¬ᵐ₀!%∧⁽ḂĂŘḌ≈⅟yø}ðᴹ⌜ḢuimΠe₃YØ]QÐUI˙M≥AEᵈ
len: 182
unused ascii: "$()/:;?@_abkqvwx
remaining space: 74

from flax.interpreter import atoms, quicks, train_separators
a="!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
r=list(atoms.keys())+list(quicks.keys())+list(train_separators.keys())
r+=list("0123456789[ ]j.¯'")
r="".join(r)
r=list(set(r))
r="".join(r)
print(r)
print("len:",len(r))
print("unused ascii:","".join(x for x in a if x not in r))
print("remaining space:",256-len(r))