def abbreviation(a, b)
aArray = a.split('')
idx = 0
aArray.each do |char|
    #print "char: #{char}n"
    #print "Before loops: #{aArray}n"
    if char.casecmp(b[idx]) == 0
        char.upcase!
        idx += 1
        #print "char: #{char}nArry: #{aArray}n"
        #print "idx: #{idx}n siz: #{b.size}n"
        if idx == b.size
            aArray.reject! {|i| i == 'delete'}
            aArray.slice!(b.size)
            break
          end
    else
      aArray[aArray.index(char)] = 'delete'
      #print "deleted, now is: #{aArray}n"
    end
  end
  res = aArray.join('')
  if res == b
    return 'YES'
  else
    return 'NO'
  end