&MULTIPLE_FORCE_EVALS
   FORCE_EVAL_ORDER 2 1   
&END
&FORCE_EVAL
  METHOD FIST
  &MM
    &FORCEFIELD
       PARM_FILE_NAME ../sample_pot/acn_respa.pot
       PARMTYPE CHM
       &CHARGE
        ATOM CT
        CHARGE 0.000
       &END CHARGE
       &CHARGE
        ATOM YC
        CHARGE  0.000
       &END CHARGE
       &CHARGE
        ATOM YN
        CHARGE 0.000
       &END CHARGE
       &CHARGE
        ATOM HC
        CHARGE  0.000
       &END CHARGE
    &END FORCEFIELD
    &POISSON
      &EWALD
        EWALD_TYPE SPME
        ALPHA .44
        GMAX 32
        O_SPLINE 6
      &END EWALD
    &END POISSON
  &END MM
&END FORCE_EVAL
&FORCE_EVAL
  METHOD FIST
  &MM
    &FORCEFIELD
       PARM_FILE_NAME ../sample_pot/acn.pot 
       PARMTYPE CHM
       &CHARGE
        ATOM CT
        CHARGE -0.479
       &END CHARGE
       &CHARGE
        ATOM YC
        CHARGE  0.481
       &END CHARGE
       &CHARGE
        ATOM YN
        CHARGE -0.532
       &END CHARGE
       &CHARGE
        ATOM HC
        CHARGE  0.177
       &END CHARGE
    &END FORCEFIELD
    &POISSON
      &EWALD
        EWALD_TYPE SPME
        ALPHA .44
        GMAX 32
        O_SPLINE 6
      &END EWALD
    &END POISSON
  &END MM
  &SUBSYS
    &CELL
      ABC 27.0 27.0 27.0
    &END CELL
    &TOPOLOGY
      CONNECTIVITY GENERATE
      &GENERATE
       BONDPARM_FACTOR 1.31
      &END
      MOL_CHECK
      COORD_FILE_NAME ../sample_pdb/acn.pdb
      COORDINATE      pdb
    &END TOPOLOGY
  &END SUBSYS
&END FORCE_EVAL
&GLOBAL
  PROJECT acn_respa
  RUN_TYPE md
  IOLEVEL  LOW
&END GLOBAL
&MOTION
  &MD
    &RESPA
       FREQUENCY 5
    &END RESPA
    ENSEMBLE NVE
    STEPS 4
    TIMESTEP 2.5
    TEMPERATURE 300
  &END MD
&END MOTION
