d1: DISTANCE ATOMS=1,10
d2: DISTANCE ATOMS=50,40
mdg: PBMETAD ARG=d1,d2 SIGMA=1 ADAPTIVE=DIFF SIGMA_MIN=0.1,0.1 HEIGHT=1.0 PACE=1 TEMP=300 BIASFACTOR=5 GRID_WSTRIDE=10 GRID_MIN=0,0 GRID_MAX=10,10 INTERVAL_MIN=0,0 INTERVAL_MAX=8,8 WALKERS_MPI
