18.1.1 diecisiete
and veinticinco but treinta y tres and cuarenta y ocho
diecisiete (seventeen)
and veinticinco
(twenty-five) are written as one word. But numbers higher
than thirty have their singles as a separate word after
y:
treinta y
cinco, cuarenta
y tres, cincuenta
y
seis aber veinticinco,
veinticuatro,
dieciocho,
diecinueve,
veintisiete
und veinticuatro.
Furthermore are once
(eleven), doce (twelve),
trece (thirteen), catorce
(fourteen) and quince
(fifteen) irregular.