If 3 male students and 3 female students pass through the door one by one, find the number of cases in which 3 male students pass through the door in succession.
3 3 [OP_ADD] 3 1 [OP_SUB] [OP_SUB] 3 3 [OP_ADD] 3 1 [OP_SUB] [OP_SUB] [OP_PERM] 3 3 [OP_PERM] [OP_MUL]
var_a = 3
var_b = 3
var_c = var_a + var_b
var_d = 3
var_e = 1
var_f = var_d - var_e
var_g = var_c - var_f
var_h = 3
var_i = 3
var_j = var_h + var_i
var_k = 3
var_l = 1
var_m = var_k - var_l
var_n = var_j - var_m
var_o = 1
var_g = int(var_g)
var_n = int(var_n)
for i, elem in enumerate(range(var_n)):
    var_o = var_o * (var_g-i)
var_p = 3
var_q = 3
var_r = 1
var_p = int(var_p)
var_q = int(var_q)
for i, elem in enumerate(range(var_q)):
    var_r = var_r * (var_p-i)
var_s = var_o * var_r
print(int(var_s))