VPL := [[[5, {{1, 3}, {1, 4}}], [3, 2*m, 2*n], [2*m, n, m, 2*n], [1, 1/4/m, 1/
2/n, 1/2/m, 1/4/n]], [[5, {{1, 3}, {1, 4}}], [3*l, 2, 2*n], [l, 2, n, 2*n], [1
/3/l, 1/2, 1/2/n, 1, 1/4/n]], [[5, {{1, 3}, {1, 4}}], [3*l, 2*m, 2], [l, 2*m,
m, 2], [1/3/l, 1/4/m, 1, 1/2/m, 1/2]]];