int ngr = mg[4]->GetListOfGraphs()->GetSize();
TList * gr_list = mg[0]->GetListOfGraphs();
TGraph * gr0 = (TGraph *)gr_list->First();
TGraph * gr1 = (TGraph *)gr0->Clone();
TGraph * gr0 = (TGraph *)gr_list->After(gr0);
TGraph * gr2 = (TGraph *)gr0->Clone();
TGraph * gr0 = (TGraph *)gr_list->After(gr0);
TGraph * gr3 = (TGraph *)gr0->Clone();