C = eval(input())



if C in ["a","i","u","e","o"]:

    print("vowel")

else:

    print("consonant")
c = eval(input())

if c in ["a","i","u","e","o"]:

     print("vowel")

else:

    print("consonant")
C = eval(input())
if C in ["a", "i", "u", "e", "o"]:
    print("vowel")
else:
    print("consonant")

c = eval(input())
if c in ["a", "i", "u", "e", "o"]:
    print("vowel")
else:
    print("consonant")

-C = eval(input()) -if C in ["a", "i", "u", "e", "o"]: +c = eval(input()) +if c in ["a", "i", "u", "e", "o"]: