删除list 中重复的名字，并统计总人数

###Task###: 
1)Find out the duplicated value in the list;
2)Remove all the duplicated value;
3)Output the sorting list in ascending order;
4)Output the total count number from sorted list.

###Solution###:

numbers = [4, 6, 1, 23, 12, 6, 12, 4, 6, 23, 12, 8, 9]
uniques = []
for number in numbers:
    if number not in uniques:
        uniques.append(number)
uniques.sort()
print(uniques)
print(len(uniques))