# frozen_string_literal: true

def solve
  solve_ ? 'SUCCESS' : 'FAILURE'
end

def solve_
  b = S_BEFORE.bools
  a = S_AFTER.bools

  return true if a.sum != b.sum
  return false if b.same

  case N
  when 0 then b != a
  when 1
    b == (b[0] == b[2] ? a : a.reverse)
  end
end

class Array
  def same
    uniq.size == 1
  end
end

class String
  def bools
    chars.map { _1 == 'o' ? 0 : 1 }
  end
end

S_BEFORE = gets.chomp
N = gets.to_i
S_AFTER = gets.chomp

puts solve