anchor.diff:      isIsogram "Alphabet" |> should equal false
   
   [<Fact(Skip = "Remove to run test")>]
  +let ``Word with duplicated character in mixed case, lowercase first`` () =
  +    isIsogram "alphAbet" |> should equal false
  +
  +[<Fact(Skip = "Remove to run test")>]
   let ``Hypothetical isogrammic word with hyphen`` () =
       isIsogram "thumbscrew-japingly" |> should equal true
   
  
positive.code: // This file was auto-generated based on version 1.4.0 of the canonical data.
  
  module IsogramTest
  
  
negative.code: let ``Duplicated character in the middle`` () =
      isIsogram "accentor" |> should equal false
  
  [<Fact(Skip = "Remove to run test")>]
  let ``Same first and last characters`` () =
      isIsogram "angola" |> should equal false
  
  