IF you were born on the:
1st, 10th, 19th, 28th
Of any month you are number 1.
2nd, 11th, 20th, 29th
Of any month then you are number 2.
3rd, 12th, 21st, 30th
Of any month then you are number 3.
4th, 13th, 22nd, 31st
Of any month then you are Number 4.
5th, 14th, 23rd
Of any month then you are...