how to find permutation of three numbers in python list
if __name__ == '__main__':
x = int(input())+1
y = int(input())+1
z = int(input())+1
n = int(input())
variable = []
for i in range(0,x):
for j in range(0,y):
for k in range(0,z):
if ( i+j+k) != n:
variable.append([i, j, k])
print(variable)