ff11ff contains f10f11f12f13f14f15f16f17f18f19f1af1bf1cf1df1ef1f10f11f12f13f14f15f16f17f18f19f1af1bf1cf1df1ef1fff1 contains 1f01f11f1f01f11f21f31f41f51f61f71f81f91fa1fb1fc1fd1fe1ff21f31f41f51f61f71f81f91fa1fb1fc1fd1fe1ff1f contains ff0ff1ff2ff3ff4ff5ff6ff7ff8ff9ffaffbffcffdffeffff0ff1ff2ff3ff4ff5ff6ff7ff8ff9ffaffbffcffdffefff
contains f10f11f12f13f14f15f16f17f18f19f1af1bf1cf1df1ef1f10f11f12f13f14f15f16f17f18f19f1af1bf1cf1df1ef1fff1
contains 1f01f11f1f01f11f21f31f41f51f61f71f81f91fa1fb1fc1fd1fe1ff21f31f41f51f61f71f81f91fa1fb1fc1fd1fe1ff1f
contains ff0ff1ff2ff3ff4ff5ff6ff7ff8ff9ffaffbffcffdffeffff0ff1ff2ff3ff4ff5ff6ff7ff8ff9ffaffbffcffdffefff