Answer:
diptongo
caos, puerta, Europa, oeste, cielo, oblicuo, Asia, teorema, peinado, puerto, junio, hay, astronauta, afeitarse
Hiato
frío, bahía, país, filosofía,
In 1988, the President
Ronald Reagan
expanded so
it would cover a whole month:
from September 15
to October 15.
Explanation: