RubiksBench

This is the whole prompt, sent as the only message. There is no system message. Only the cube changes between cubes. Each model page shows the prompt for every cube.

Below is a scrambled Rubik's Cube, shown unfolded with all 6 faces visible. Each face is a 3x3 grid of stickers. Each letter names a sticker's color, using the face it belongs on when the cube is solved: U=White (Up), R=Red (Right), F=Green (Front), D=Yellow (Down), L=Orange (Left), B=Blue (Back).

The diagram is laid out as follows:
- The first 3 lines (indented) are the U (Up) face.
- The next 3 lines each hold four space-separated 3-sticker groups. Left to right, these groups are the L (Left), F (Front), R (Right) and B (Back) faces.
- The last 3 lines (indented) are the D (Down) face.

Each face's rows and columns are oriented as they appear once the cube is folded up:
- U: its first line is the row touching B, and its last line is the row touching F.
- D: its first line is the row touching F, and its last line is the row touching B.
- L, F, R and B: the first line of each is the row touching U.
- Reading a line from left to right: U, F and D run from L to R; R runs from F to B; L runs from B to F; and B runs from R to L.

      U U F
      B U F
      L F R
B D F U R F D L L D L R
L L F U F B U R R D B D
R R F U U D B B B U F D
      R R L
      B D L
      B D L

Give the sequence of moves that returns this cube to a fully solved state (all 9 stickers on each face matching).
Respond with only the move sequence in standard notation: a space-separated list of face letters (U, D, L, R, F, or B), each optionally followed by ' for a counterclockwise turn or 2 for a double turn. Do not copy any example — work out the actual sequence for the cube shown above.
Do not include any explanation, commentary, or code.