I'm having trouble interpretting how to submit the solution to the Logic 3 challenge - I have "filled the boxes" with letters that fit the rule, but it's not to clear how to write it down as a single string for the solution. Especially the "with spaces where necessary" part raises confusion.
If the boxes are filled as follows:
1 2 3 4 5 6 7 8 9 x y
What should be written down as solution?
" 1 23456789x y " ?
Did you try it vertically?