please make the following prolog program

please make the following prolog  program

i hav try .but require result not come
my predicatelike this
plz find out mistake from it.




listtran([],[]).
listtran([Ha/Ta],[Hb/Tb]):-tran(Ha,Hb),listtran(Ta,Tb).

the given question is this:

Suppose we are given a knowledge base with the following facts:
tran(eins,one).
tran(zwei,two).
tran(drei,three).
tran(vier,four).
tran(fuenf,five).
tran(sechs,six).
tran(sieben,seven).
tran(acht,eight).
tran(neun,nine).
Write a predicate listtran(G,E) which translates a list of German
number words to
the corresponding list of English number words. For example:
listtran([eins,neun,zwei],X).
should give:
X = [one,nine,two].
Your program should also work in the other direction. For example, if
you give it the query listtran(X,[one,seven,six,two]).
it should return:
X = [eins,sieben,sechs,zwei].
Hint: to answer this question, first ask yourself 'How do I translate
the empty list of number words?'. That's the base case. For non-empty
lists, first translate the head of the list, then use recursion to
translate the tail.

naznadi@gmail.com wrote:
> please make the following prolog  program
>
> i hav try .but require result not come
> my predicatelike this
> plz find out mistake from it.
>
>
>
>
> listtran([],[]).
> listtran([Ha/Ta],[Hb/Tb]):-tran(Ha,Hb),listtran(Ta,Tb).
>
> the given question is this:
> [...]


you have a syntax error when constructing lists. just use the pipe
symbol | instead of slash / . if you google for "prolog lists" you will
find eg. http://www.csupomona.edu/~jrfisher/...torial/2_7.html
where the list syntax is described in more detail.

hth Martin