When 4 students who are Hyunji, Eunjeong, Migeum, and Youngmi are lined up in a row, find the number of cases where Eunjeong stands at the front or at the back.
[OP_LIST_SOL] Hyunji Eunjeong Migeum Youngmi [OP_LIST_EOL] [OP_LIST_SOL] Eunjeong [OP_LIST_EOL] [OP_SET_DIFFERENCE] [OP_LIST_LEN] [OP_LIST_LEN] [OP_PERM] [OP_LIST_SOL] Front Back [OP_LIST_EOL] [OP_LIST_LEN] [OP_MUL]
var_a = 'Hyunji'
var_b = 'Eunjeong'
var_c = 'Migeum'
var_d = 'Youngmi'
list_a= []
if "/" in str(var_d):
    var_d = eval(str(var_d))
list_a.append(var_d)
if "/" in str(var_c):
    var_c = eval(str(var_c))
list_a.append(var_c)
if "/" in str(var_b):
    var_b = eval(str(var_b))
list_a.append(var_b)
if "/" in str(var_a):
    var_a = eval(str(var_a))
list_a.append(var_a)
list_a.reverse()
var_e = 'Eunjeong'
list_b= []
if "/" in str(var_e):
    var_e = eval(str(var_e))
list_b.append(var_e)
list_b.reverse()
list_c = list(set(list_a) - set(list_b))
var_f = len(list_c)
var_g = len(list_c)
var_h = 1
var_f = int(var_f)
var_g = int(var_g)
for i, elem in enumerate(range(var_g)):
    var_h = var_h * (var_f-i)
var_i = 'Front'
var_j = 'Back'
list_d= []
if "/" in str(var_j):
    var_j = eval(str(var_j))
list_d.append(var_j)
if "/" in str(var_i):
    var_i = eval(str(var_i))
list_d.append(var_i)
list_d.reverse()
var_k = len(list_d)
var_l = var_h * var_k
print(int(var_l))