<⁼ <"foo" %% "foo" !"<⁼: Argument wasn't a rank 0 array" % <⁼ 4 !"<⁼: Argument wasn't a rank 0 array" % <⁼ ↕0 !"<⁼: Argument wasn't a rank 0 array" % <⁼ "f" ⋈⁼ ⋈"foo" %% "foo" ⋈⁼ "f" %% 'f' !"⋈⁼: Argument wasn't a length-1 list" % ⋈⁼ 4 !"⋈⁼: Argument wasn't a length-1 list" % ⋈⁼ ↕0 !"⋈⁼: Argument wasn't a length-1 list" % ⋈⁼ ≍"f" !"⌽: Argument cannot be a unit" % ⌽⁼ 0 ⌽⁼ ↕10 %% 9-↕10 !"⍉⁼: 𝕩 must not be an atom" % ⍉⁼ 3 ⍉⁼ <3 %% <3