OCC,4,1,1;             ! four sigma, one pi orbitals are occupied
FROZEN,1;              ! first sigma orbital is doubly occupied and frozen
WF,6,1;                ! 6 electrons, singlet Sigma+ state
SELECT                 ! triggers configuration input
CON,2,2                ! 2sigma**2, 3sigma**2
CON,2,1,1              ! 2sigma**2, 3sigma, 4sigma
CON,2,0,2              ! 2sigma**2, 4sigma**2
CON,2,0,0,2            ! 2sigma**2, 1pi_x**2
CON,2,0,0,0,2          ! 2sigma**2, 1pi_y**2