void Comb()
{	
	TFile* fa = new TFile("S_0_Imp.root", "READ");
	TGraph* G1 = (TGraph*) fa->Get("Graph1");	
	TGraph* G2 = (TGraph*) fa->Get("Graph2");	
	
	TFile* fb = new TFile("S_1_Imp.root", "READ"); 
	TGraph* G3 = (TGraph*) fb->Get("Graph1");	
	TGraph* G4 = (TGraph*) fb->Get("Graph2");
	
	TFile* fc = new TFile("S_0_M.root", "READ"); 
	TGraph* G5 = (TGraph*) fc->Get("Graph1");	
	TGraph* G6 = (TGraph*) fc->Get("Graph2");
	
	TFile* fd = new TFile("S_1_M.root", "READ"); 
	TGraph* G7 = (TGraph*) fd->Get("Graph1");	
	TGraph* G8 = (TGraph*) fd->Get("Graph2");	
	
	TCanvas *c1 = new TCanvas();
	TCanvas *c2 = new TCanvas();
	TCanvas *c3 = new TCanvas();
	TCanvas *c4 = new TCanvas();
	TCanvas *c5 = new TCanvas();
	
	auto mg = new TMultiGraph();
	
	c1->cd();
	G1->Draw("ALP");
	G2->Draw("SAME");
	
	c2->cd();
	G3->Draw("ALP");
	G4->Draw("SAME");
	
	c3->cd();
	G5->Draw("ALP");
	G6->Draw("SAME");
	
	c4->cd();
	G7->Draw("ALP");
	G8->Draw("SAME");
	
	c5->cd();
	mg->Add(G1,"APL");
	mg->Add(G2,"APL");
	mg->Draw("APL");
	
	c1->BuildLegend();
	c2->BuildLegend();
	c3->BuildLegend();
	c4->BuildLegend();
	c5->BuildLegend();

}