Pencil, eraser, pen, ruler, and notebook are on the desk in this order. When you swap the positions of the pen and the notebook, in what position (in ordinal number) would the notebook be?
[OP_LIST_SOL] Pencil eraser pen ruler notebook [OP_LIST_EOL] notebook [OP_LIST_INDEX]
var_a = 'Pencil'
var_b = 'eraser'
var_c = 'pen'
var_d = 'ruler'
var_e = 'notebook'
list_a= []
if "/" in str(var_e):
    var_e = eval(str(var_e))
list_a.append(var_e)
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_f = 'notebook'
var_g = list_a.index(var_f)+1
print(int(var_g))