A little red house, in amongst the trees;
Oh look who's there, say hello for me!
Take a book, Leave a book - it's all the same to me;
As long as it makes you smile - I'll claim victory!
So as to dissuade muggling, cache is padlocked in - but geocachers can access the cache using the code found by solving this simple puzzle -
On the front of the little red house you will find a 4 digit code - ABCD
The combination of the lock is as follows -
A-D = ?
B-D = ?
C-D = ?
Or just check the hint! it's not supposed to be hard :)