1-first
2-second
3-third
4-fourth
5-fifth
9-ninth
12-twelfth
21-twenty-first
C is the third letter of the alphabet.
April is the fourth month of the year.
L is the twelfth letter of the alphabet.
Monday is the first day of the week.
n-am stiut la aia cu "may day" dar sper ca te-am ajutat.