R={x: 100, y: -1}
L={x: 0,  y: -1}
H={x: -1, y: 100}
D={x: -1, y: 0}
M={x: -1, y: 62}
N={x: 81, y: -1}
O={x: -1, y: 11}
P={x: -1, y: 100-O.y}

A="RMLDHRM"         -> [(R)(M)(L)(D)(H)(R)(M)]
B="LRMLDHNM"        -> [(L)(R)(M)(L)(D)(H)(N)(M)]
C="RLHR"            -> [(R)(L)(H)(R)]
D="LH(PR)(OR)(DL)"  -> [(L)(H)(PR)(OR)(DL)] 