You want to distribute 4 different ice creams to your friend. There are 4 friends: Kahi, Nahee, Dahee, and Rahee. How many cases are there?
4 4 [OP_PERM]
var_a = 4
var_b = 4
var_c = 1
var_a = int(var_a)
var_b = int(var_b)
for i, elem in enumerate(range(var_b)):
    var_c = var_c * (var_a-i)
print(int(var_c))