phi:   TORSION ATOMS=5,7,9,15     NOPBC
psi:   TORSION ATOMS=7,9,15,17    NOPBC

METAD ...
 ARG=phi,psi
 SIGMA=0.20,0.20
 HEIGHT=1.20
 BIASFACTOR=10
 PACE=500
 LABEL=metad
 FILE=HILLS
 GRID_MIN=-pi,-pi
 GRID_MAX=pi,pi
 GRID_BIN=150,150
 CALC_RCT
... METAD

PRINT ...
 ARG=phi,psi,metad.bias,metad.rbias,metad.rct
 STRIDE=500
 FILE=COLVAR
 FMT=%8.4f
... PRINT





