new_contents: def alternatingSums(a):
      # teamOne = [n for i, n in enumerate(a) if i % 2 == 0]
      # teamTwo = [n for i, n in enumerate(a) if i % 2 == 1]
      # return (sum(teamOne), sum(teamTwo))
      return (sum(a[::2]), sum(a[1::2]))
  
subject: Solve Code Fights alternating sums problem