Encode::Arabic::Exec3pm

    use Encode::Arabic::Exec;                   #   'encode' and 'decode' will be tried out
    use ElixirFM::Exec '.';                     #   './elixir' will be invoked
    use ElixirFM::Exec './elixir';              #   './elixir' will be invoked
    use ElixirFM::Exec 'some/other';            #   'some/other/elixir' unless
                                                #   'some/other' is executable
    ElixirFM::Exec::elixir 'help';
    import ElixirFM::Exec 'other/elixir';       #   switching to 'other/elixir'
    ElixirFM::Exec::elixir 'inflect',           #   requested mode of operation
                           ["V[PI]---3MS--"],   #   optional command-line params
                           "(1320,1)",          #   supplied standard-input data
                           "(1234,[])";         #   which can be split by lines
    ElixirFM::Exec::inflect ["V[PI]---3MS--"], "(1320,1)", "(1234,[])";