list(alpha = c(NA, 1, 1, 1, 1),
   beta = structure(.Data = c(NA, NA, NA, NA, NA,
                        NA, 2, 2, 2, 2,
                        NA, 2, 2, 2, 2,
                        NA, 2, 2, 2, 2), .Dim = c(4, 5)),
      gamma = structure(.Data = c(NA, NA, NA, NA, NA,
                              NA, 3, 3, 3, 3), .Dim = c(2, 5)),
      lambda = structure(.Data = c(4, 4, 4, 4,
                           4, 4, 4, 4), .Dim = c(4, 2)))