class Calc0197
  def initialize(args)
    args = args.map { |l| l.chomp.split(/\s+/) }
    @before = args.shift.first
    @n = args.shift.first.to_i
    @after = args.shift.first
  end

  def calc
    cb = @before.split(//).map.with_index { |c, i| c == 'o' ? i : nil }.compact
    ca = @after.split(//).map.with_index { |c, i| c == 'o' ? i : nil }.compact

    if cb.size >= 2
      cb = [0, 1, 2] - cb
      ca = [0, 1, 2] - ca
    end

    cb.size != ca.size || @n == 0 && cb != ca || cb.size != 0 && check(cb.first, ca.first)
  end

  def check(cb, ca)
    @n == 1 && (
      [0, 2].include?(cb) && cb != ca && ca != 1 ||
      cb == 1 && ca == 1
    )
  end

  def run
    calc ? 'SUCCESS' : 'FAILURE'
  end
end

puts Calc0197.new(STDIN.readlines).run if __FILE__ == $0