# TASK 1
_digi←{⌽𝕗|⌊∘÷⟜𝕗⍟(↕1+·⌊𝕗⋆⁼1⌈⊢)}
F←{a←-∘(⌈⌾(2⋆⁼⊢))∘≠⊸↑ 2 _digi 𝕩
   (⊣+2×⊢)´∘⌽⥊⌽a⥊˜(2÷˜⊢)⊸(÷˜⋈⊣)≠a}
86=F 101
33=F 18