# coding: utf8
from __future__ import unicode_literals

class IrishMorph:
    consonants = ['b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'q', 'r', 's', 't', 'v', 'w', 'x', 'z']
    broad_vowels = ['a', 'á', 'o', 'ó', 'u', 'ú']
    slender_vowels = ['e', 'é', 'i', 'í']
    vowels = broad_vowels + slender_vowels

    def ends_dentals(word):
        if word != "" and word[-1] in ['d', 'n', 't', 's']:
            return True
        else:
            return False

    def devoice(word):
        if len(word) > 2 and word[-2] == 's' and word[-1] == 'd':
            return word[:-1] + 't'
        else:
            return word

    def ends_with_vowel(word):
        return word != "" and word[-1] in vowels

    def starts_with_vowel(word):
        return word != "" and word[0] in vowels

    def deduplicate(word):
        if len(word) > 2 and word[-2] == word[-1] and word[-1] in consonants:
            return word[:-1]
        else:
            return word