Options to specify input and output files:
-f [<.xtc/.trr/...>] (traj.xtc) (Input)
- Input file description: xtc trr cpt trj gro g96 pdb tng
+ Input file description: xtc trr cpt gro g96 pdb tng
-mult [<.xtc/.trr/...> [...]] (traj.xtc) (Input, Opt.)
- Multiple file description: xtc trr cpt trj gro g96 pdb tng
+ Multiple file description: xtc trr cpt gro g96 pdb tng
-lib [<.dat>] (libdata.dat) (Input, Opt., Lib.) Library file description
-io [<.dat>] (inout.dat) (In/Out, Opt.) Input/Output file description
-o <.xvg> (Output, Opt.) Output file description