How many two-digit natural numbers have both odd digits or both even digits?
11 99 1 [OP_LIST_ARANGE] [OP_LIST_NUM2SUM] 2 [OP_LIST_DIVISIBLE] [OP_LIST_LEN]
var_a = 11
var_b = 99
var_c = 1
list_a = [i for i in range(var_a, var_b + 1, var_c)]
list_b=[]
for i in list_a:
    var_d = 0
    i = int(i)
    while i//10 > 0:
        var_d = var_d + i%10
        i = i//10
    var_d = var_d + i%10
    list_b.append(var_d)
var_e = 2
list_c = []
var_e = int(var_e)
for i in list_b:
    i = int(i)
    if i % var_e == 0:
        list_c.append(i)
var_f = len(list_c)
print(int(var_f))