print([[a,b,c] for a in range(x+1)
   for b in range(y+1)
   for c in range(z+1) if a+b+c!=n])

if name == 'main': x = int(input()) y = int(input()) z = int(input()) n = int(input())

print(
    [
        [i, j, k] 
        for i, j, k in product(range(x + 1), range(y + 1), range(z + 1)) 
        if i + j + k != n
    ]
)

x = int(input()) y = int(input()) z = int(input()) n = int(input()) array = [] for i in range(x+1): for j in range(y+1): for k in range(z+1): if i+j+k != n: array.append([i,j,k]) print(array)

Here is solution in python - https://programmingoneonone.com/hackerrank-list-comprehensions-solution-in-python.html

print([[i, j, k] for i in range(x + 1) for j in range(y + 1) for k in range(z + 1) if i + j + k != n])