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();
	
	
	auto mg1 = new TMultiGraph();
	auto mg2 = new TMultiGraph();
	auto mg3 = new TMultiGraph();
	auto mg4 = new TMultiGraph();
	
	
	c1->cd();
	mg1->Add(G1, "APL");
	mg1->Add(G3, "APL");
	mg1->Draw("APL");
	
	
	c2->cd();
	mg2->Add(G2, "APL");
	mg2->Add(G4, "APL");
	mg2->Draw("APL");
	
	c3->cd();
	mg3->Add(G5, "APL");
	mg3->Add(G7, "APL");
	mg3->Draw("APL");
	
	c4->cd();
	mg4->Add(G6, "APL");
	mg4->Add(G8, "APL");
	mg4->Draw("APL");
	
	c1->BuildLegend();
	c2->BuildLegend();
	c3->BuildLegend();
	c4->BuildLegend();
	

}