numbers
primero
1st
sexto
6th
undécimo
12th
decimosexto
16th
segundo
2nd
séptimo
7th
duodécimo
12th
decimoséptimo
17th
tercero
3rd
octavo
8th
decimotercero
13th
decimoctavo
18th
cuarto
4th
noveno
9th
decimocuarto
13th
decimonoveno
19th
quinto
5th
decimo
10th
decimoquinto
15th
vigésimo
20th