title: Check the first character of all words in an array and return the one that starts with eg "a or etc" in the array
body: <p>I'm trying to find the first character in the array which is contained by a few words.</p>
  
  <p>I got all the words but I don't know how to check the first character of all????!!!!!</p>
  
  <pre><code>def strange_words(words)
    newarray = []
    i = 0
    while i &lt; words.length
      letters = words[i]
      if ???? #problem is here
  
      end 
      i += 1
    end
    return newarray   
  end
  
  puts strange_words(["eating", "period", "value", "earth"])
  </code></pre>
  
  <p>for example, the first character in value is "v" and I want that.
  Thanks</p>