#!/usr/bin/env python
from sys import argv
import tsase
import ase.io

poscar = True
if argv[1].startswith('POSCAR'):
    atoms = ase.io.read(argv[1])
else:
    atoms = tsase.io.read_socorro(argv[1])
    poscar = False

if poscar:
    tsase.io.write_socorro('crystal', atoms)
else:
    ase.io.write('POSCAR', atoms)
