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                        g = {'А', 'Е', 'Ё', 'И', 'У', 'О', 'Я', 'Ы', 'Э', 'Ю'}
s = input().split()
last = -1
start = -1
first = 0
f = 0
GL = 0
gl = 0
cnt = 0
el = s[0]
if len(s) == 1:
    el = s[0]
    for i in range(len(el)):
        if el[i].isupper() and el[i] not in g:
            print('ошибка')
            exit()
        if el[i].isupper() and f:
            print('ошибка')
            exit()
        if el[i].upper() in g:
            gl += 1
            GL += 1
        if el[i].isupper():
            start = gl
            f = 1
    if gl and not f:
        print('ошибка')
        exit()
    if start == -1:
        print('не стихи')
        exit()
    if (start == 2 and gl == 3) \
            or (start == 1 and gl == 2) \
            or (start == 2 and gl == 2):
        print('недостаточно информации')
        exit()
last = -1
start = -1
first = 0
GL = 0
f = 0
gl = 0
cnt = 0
el = s[0]
while start == -1 and first < len(s):
    el = s[first]
    first += 1
    for i in range(len(el)):
        if el[i].isupper() and el[i] not in g:
            print('ошибка')
            exit()
        if el[i].isupper() and f:
            print('ошибка')
            exit()
        if el[i].upper() in g:
            gl += 1
            GL += 1
        if el[i].isupper():
            start = gl
            gl = 0
            f = 1
    if gl and not f:
        print('ошибка')
        exit()
if start == -1:
    print('не стихи')
    exit()
cnt = gl
for k in range(first, len(s)):
    el = s[k]
    f = 0
    gl = 0
    cnt = cnt
    for i in range(len(el)):
        if el[i].upper() in g:
            cnt += 1
            gl += 1
            GL += 1
        if el[i].isupper() and el[i] not in g:
            print('ошибка')
            exit()
        if el[i].isupper() and f:
            print('ошибка')
            exit()
        if el[i].isupper():
            if last == -1:
                last = cnt
                cnt = 0
            elif cnt != last:
                print('не стихи')
                exit()
            else:
                cnt = 0
            f = 1
    if gl and not f:
        print('ошибка')
        exit()