Enter a species  (e.g. Al, Fe): Sn
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: MEAM_LAMMPS_VellaChenStillinger_2017_Sn__MO_316045643888_002
Enter hexagonal lattice constants 'a' and 'c' (m): 3.389681580185428e-10, 5.535326841310186e-10