Welcome to SWI-Prolog (Version 2.7.16)
Copyright (c) 1993-1996 University of Amsterdam.  All rights reserved.

For help, use ?- help(Topic). or ?- apropos(Word).

1 ?- consult('enn_interpreter.pro').
enn_interpreter.pro compiled, 0.00 sec, 9,040 bytes.

Yes
2 ?- enn(Value,[eighty,nine],[]).

Value = 89

Yes
3 ?- enn(Value,[ten,thousand,eight,hundred,twenty,seven],[]).

Value = 10827

Yes
4 ?- 
enn(Value,[twenty,eight,million,two,hundred,seventy,thousand,eight,hundred,sixty,seven],[]).

Value = 28270867

Yes
5 ?- enn(Value[one],[]).

[WARNING: Syntax error: Operator expected
enn(Value[one
** here **
],[]) . ]
5 ?- enn(Value,[one],[]).

Value = 1

Yes
6 ?- enn(Value,[sixty,two],[]).

Value = 62

Yes
7 ?- enn(Value,[sevety,two,thousand],[]).

No
8 ?- enn(Value,[seventy,two,thousand],[]).

Value = 72000

Yes
9 ?- halt.