text: import FWCore.ParameterSet.Config as cms
  
  from Configuration.Eras.Era_Run2_2018_cff import Run2_2018
  from Configuration.Eras.Modifier_run3_common_cff import run3_common
  from Configuration.Eras.Modifier_run3_GEM_cff import run3_GEM
  from Configuration.Eras.Modifier_run3_HB_cff import run3_HB
  from Configuration.Eras.Modifier_run3_HFSL_cff import run3_HFSL
  from Configuration.Eras.Modifier_run2_GEM_2017_cff import run2_GEM_2017
  from Configuration.Eras.Modifier_stage2L1Trigger_2021_cff import stage2L1Trigger_2021
  from Configuration.Eras.Modifier_ctpps_2018_cff import ctpps_2018
  from Configuration.Eras.Modifier_ctpps_2021_cff import ctpps_2021
  from Configuration.ProcessModifiers.dd4hep_cff import dd4hep
  
  Run3 = cms.ModifierChain(Run2_2018.copyAndExclude([run2_GEM_2017, ctpps_2018]), run3_common, run3_GEM, run3_HB, run3_HFSL, stage2L1Trigger_2021, ctpps_2021, dd4hep)
  
  