Find words which contain the most consonants

# title: Find words which contain the most consonants
# source: https://rosettacode.org/wiki/Find_words_which_contain_the_most_consonants
# category: Rosetta Code
# difficulty: Intro
# summary: Count consonants in a fixed word list and return the words with the highest totals.
# tags: popular, strings, search, metrics
# vibe: 0.2

def letter?(char)
  char >= "a" && char <= "z"
end

def vowel?(char)
  char == "a" || char == "e" || char == "i" || char == "o" || char == "u"
end

def consonant_count(word)
  count = 0
  index = 0
  lower = word.downcase

  while index < lower.length
    char = lower.slice(index)
    if letter?(char) && !vowel?(char)
      count = count + 1
    end
    index = index + 1
  end

  count
end

def strongest_words(words)
  best = 0
  output = []
  index = 0

  while index < words.length
    word = words[index]
    count = consonant_count(word)
    if count > best
      best = count
      output = [word]
    elsif count == best
      output = output.push(word)
    end
    index = index + 1
  end

  {
    consonants: best,
    words: output
  }
end

def run
  strongest_words(["strengths", "rhythms", "vibescript", "algorithms", "crypts"])
end