Classical MD sample 
&cntrl
imin = 0,                 
irest = 1, ntx = 5,   
ntb = 1, cut = 7.0 
ntt = 3, gamma_ln = 5.0, ig = -1, 
tempi = 298.15, temp0 = 298.15
nstlim = 4000, dt = 0.0005,
ntpr = 10, ntwr = 10, ntwv = 10, ntwx = 10
/
&ewald                   
skinnb = 2.0             
/