Question $3$

Arrange three $15,$ three $25,$dots, three $9s$ in a list $($which therefore will consist of $27$ numbers$)...$

$...$ such that, for each $$ belongs to $1,9,$ there are exactly $$ numbers between two successive

occurrences $($in the list$)$ numbered $i.$

Therefore, for example, $1,2,1,8,2,4,6,2$ could be a part of the final solution, while $1,2,1,8,$

$2,4,2,6$ could not.

Solve the problem using SWI$-$Prolog, Create the Knowledge Base in

listof$27.$pl file. Run

the program, screen shot the output and pasted it to a Word document.