Can define operator '.', but it doesn't parse about trealla HOT 5 CLOSED

Ok, fixed. Nice little dictionary.

tpl
?- [quotes].
true.
?- main.
"Winning isn’t everything, but wanting to win is."-"Vince Lombardi"
true

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I don't know whether wall is some de facto standard.
This is a little ad-hoc from one of my systems.

Also I have edited the source code just now. In case
wall gives some negative number, who knows?

Its mod/2 now:

?- X is -1 mod 5.
X = 4.

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That was located out of sight, Jean-Luc.
Thank you for this impulse: X = (Y is B+_)

$ cat is.pl
{_ is _+1}.
{_ is _+2}.
{_ is _+3}.
{_ is _+4}.
{_ is _+5}.
main :- between(1,5,N), call_nth({X}, N),
        X = (Y is B+_),
        write('+'), between(1,3,B), X, write(Y), fail.

$ tpl
?- "is".
   true.
?- main.
+234+345+456+567+678   false.
?-

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from trealla.

I can consult and run it now.
Maybe the code itself needs a little bit more cuts.

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