Example input file msd.inpt:
disp.out
300 nmsdlength
2 nspecies
1728 number of species 1
-1.0 charge on species 1
864 number of species 2
2.0 charge on species 2
.false. restart?
.false. read disp.out data from this input file?
200 steps per disp.out frame
100.0 timestep
174000 simulation length (timesteps)
.true. skip disp.out header