Pig latin 11/12 help me i don't understand


pyg = 'ei'

original = raw_input('Escribe una palabra:')
palabra = original.lower()
primera = palabra[0]
if len(original) > 0 and original.isalpha():
	print palabra
	if primera == "a" or primera == 'e' or primera == 'i' or primera == 'o' or primera == 'u':
	    print 'vocal'
	    nueva_palabra = palabra + pyg
	    print nueva_palabra
	    print "consonante"
	print 'Vacio'


What don't you understand?
The code doesn't look like what your asked to code, but it works for how it is written.
Let me know what you don't get and i'll try and explain it differently