#### MrAdamWest

##### Programmer

I am attempting to generate a predicate minus(A,B) where A is an initial state in a list [7,3,12,1] and B is what i am attemping to get to. So minus[7,3] would be acceptable. however i can only minus the numbers 4 and 2 so [7,4] is not acceptable. Could someone please help with how i could do this. Thank you all!