12 complete form
Ordinal number 1 to 2 1, and abbreviated form:

1,No. 1 1st

2. Second, second, second

Third, third, third, third.

4. Fourth, fourth, fourth and fourth

Fifth, fifth, fifth and fifth

Six, six, six, six, six.

7. Seventh, seventh and seventh

8.one in eight

9 9 9 9 9

10,No. 10 tent 10

1 1, event 1 1

12,No. 12

13 13 No.3 13 No.3

14 14 14th 14

15 15 fifth 15

16,No. 16

17 No.7 17

18,No. 18

19, 19 19

20,20,20,20,20

2 1, No.21,No.21