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