How many odd two-digit numbers and even single-digit numbers exist?
10 99 [OP_LIST_ODD] 1 9 [OP_LIST_EVEN] [OP_SET_UNION] [OP_LIST_LEN]
var_a = 10
var_b = 99
list_a = []
if var_a%2==0:
    for i in range(var_a+1, var_b+1, 2):
        list_a.append(i)
else:
    for i in range(var_a, var_b+1, 2):
        list_a.append(i)
var_c = 1
var_d = 9
list_b = []
if var_c%2!=0:
    for i in range(var_c+1, var_d+1, 2):
        list_b.append(i)
else:
    for i in range(var_c, var_d+1, 2):
        list_b.append(i)
list_c = list(set(list_a) | set(list_b))
var_e = len(list_c)
print(int(var_e))