LEVEL 1 : U R R U U R R U U R R U U R
LEVEL 2 : U U U U R R R R D D R R U U U R U U
LEVEL 3 : R R R U U U U U U U R R D D D D R R U U U U
LEVEL 4 : R U R U R U R R R R U L U R U L U R
LEVEL 5 : U R U R U R U R R R R U U L L U R R
LEVEL 6 : U U U U U U U R R R R R R R