import sys
import contacts


select1 = "resname POPC and (name O7 or name O9 or name O10 or name O11 or name P8)"
#select1 = "resname CL"
select2="resname NA"

first_ts = int(sys.argv[1])
last_ts = int(sys.argv[2])

rad = 3.5 
coord='test.gro'
traj='test.xtc'
contacts.contacts(coord,traj,rad,select1,select2,first_ts,last_ts)