n=input()
if n=='a':
  print('Vowel')
elif n=='e':
  print('Vowel')
elif n=='i':
  print('Vowel')
elif n=='o':
  print('Vowel')
elif n=='u':
  print('Vowel')
elif n=='$':
  print("invalid")
else:
  print("Consonant")  
