Count even-vowel words

Tell how many words in a sequence have an even number of vowels.

Input

Input is a (possibly empty) sequence of words, each being a sequence of one or more lower-case letters without accents or diacritical marks. They may come in one or more lines.

Output

Output must be an int: the number of words in the sequence displaying an even number of the vowels a, e, i, o, u.

Observation

Note that zero is an even number. Only imports allowed are: stdin from sys, pytokr, yogi

Problem information

Author: José Luis Balcázar

Generation: 2026-01-25T16:14:55.038Z