const suffixes = {
  singular: {
    masculine: {
      nominative: 'ός',
      genitive: 'οῦ',
      dative: 'ῷ',
      accusative: 'όν',
    },
    feminine: {
      nominative: 'ή',
      genitive: 'ῆς',
      dative: 'ῇ',
      accusative: 'ήν',
    },
    neuter: {
      nominative: 'όν',
      genitive: 'οῦ',
      dative: 'ῷ',
      accusative: 'όν',
    },
  },
  plural: {
    masculine: {
      nominative: 'οί',
      genitive: 'ῶν',
      dative: 'οῖς',
      accusative: 'ούς',
    },
    feminine: {
      nominative: 'αί',
      genitive: 'ῶν',
      dative: 'αῖς',
      accusative: 'άς',
    },
    neuter: {
      nominative: 'α',
      genitive: 'ῶν',
      dative: 'οῖς',
      accusative: 'ά',
    },
  },
};