Ali and Helping innocent people - HackerEarth Solution

s = list(input())
d = s[2]
vowel = ["A", "E", "I", "O", "U", "Y"]
s.remove(d)
s.remove("-")
if d in vowel:
    for i in range(len(s) - 1):
        if (int(s[i]) + int(s[i + 1])) % 2 != 0:
            print("invalid")
            break
        else:
            continue
    if i == len(s) - 2:
        print("valid")
else:
    print("invalid")