How can one iterate over all possible values ​​of a list with restrictions?

Question

Python

Hello, there is a code with conditions for the list, tell me how you can organize a sequential enumeration of all possible values ​​​​of the list with sequential output.

pr1=[2,3,1,2,4]
pr2=[3,4,10,11,12]

n=5
xlst=[0] * n

for i in range(len(xlst)):
  if (n-sum(xlst[:i]))>0:
    xn=n-sum(xlst[:i])
  else:
    xn=0
  xlst[i]=min(xn, pr1[i], pr2[i]-sum(xlst[:i]))