⎊)𝔽⎊𝔾 𝕩, 𝕨 𝔽⎊𝔾 𝕩: CatchApply 𝔽 to the arguments.
If an error happens when 𝔽 is applied, cancel its execution, apply 𝔾 to the arguments and return its result.
Otherwise, return the result of 𝔽.
∾⎊{"error occurred with argument: "∾•Fmt 𝕩} 1 "error occurred with argument: 1" ∾⎊{"error occurred with argument: "∾•Fmt 𝕩} ⟨⟨1,2⟩, ⟨3,4⟩⟩ ⟨ 1 2 3 4 ⟩