defmodule Main do
  def main do
    1..(IO.read(:line)
        |> String.trim()
        |> String.to_integer())
    |> Enum.map(fn _ ->
      IO.read(:line)
      |> String.trim()
      |> String.to_integer()
    end)
    |> solve
    |> IO.puts()
  end

  def solve(x) do
    solve_rec(x, true, 0)
  end

  def solve_rec([], i, _) do
    cond do
      i -> "T"
      true -> "F"
    end
  end

  def solve_rec(x, i, l) do
    cond do
      ((x |> hd) - l) |> abs != 1 -> "F"
      true -> solve_rec(x |> tl, i, x |> hd)
    end
  end
end