applications.collages.gridAlgebra("2-grid algebra"):
( 2,
  {
    F = 0cd-1ad-2da,
    G = 0da-1dc-2ad,
    H = 0cb-1dc-2ab,
    I = 0bc-1cd-2bc,
    J = 0cb-1ad-2bc,
    K = 0ab-1ab-2bc
  }
)
