a=input()
if (a=='a')or(a=='e') or (a=='i') or (a=='o') or(a=='u') or( a=='A')or(a=='E')or(a=='I')or(a=='O')or(a=='U'):
	print('Vowel')
elif(a>='a' and a<='z'):
	print("Consonent")
else:
	print("invalid")