          
L0: Is D1 = B? (yes=L1)
  L1: Is D4 = A? (yes=L3)
    L3: 1 happens  6  times.
  L1: Is D4 = B? (yes=L4)
    L4: 0 happens  1  times.
  L1: Is D4 = C? (yes=L5)
    L5: 1 happens  2  times.
L0: Is D1 = C? (yes=L2)
  L2: 0 happens  7  times.
