TII subcells for the SL(2,H) x PU(2,2) block of SL4
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cell#0 , |C| = 2
special orbit = [2, 2]
special rep = [2, 2] , dim = 2
cell rep = phi[2,2]
TII depth = 1
TII multiplicity polynomial = 2*X
TII subcells:
  tii[3,1] := {0}
  tii[3,2] := {1}

cell#1 , |C| = 1
special orbit = [1, 1, 1, 1]
special rep = [1, 1, 1, 1] , dim = 1
cell rep = phi[1,1,1,1]
TII depth = 1
TII multiplicity polynomial = X
TII subcells:
  tii[1,1] := {0}