local a = "Lucky Turtleman"
local b = "Unlucky Turtleman"
local n = io.read("*n", "*l")
local s = io.read()
local t = io.read()
for i = 1, n do
  if s:sub(i, i) == "o" and t:sub(i, i) == "o" then
    print(a) os.exit()
  end
end
print(b)