{

TChain *chainV = new TChain("event");
TChain *chainB = new TChain("event");

 for(int it = 1;it<7;it++){
   chainV->Add(Form("/space/rebassoo/MuonChowderNtuples/MuonChowderNtupleCombined%i.root/configurableAnalysis/eventV",it));
   chainB->Add(Form("/space/rebassoo/MuonChowderNtuples/MuonChowderNtupleCombined%i.root/configurableAnalysis/eventB",it));
 }

}