$contrl scftyp=RHF runtyp=optimize icharg=0
     mult=1 coord=cart $end
 $system timlim=16660 mwords=20 $end
 $statpt nstep=350 HESS=calc PURIFY=.TRUE. hssend=.true. $end
 $basis gbasis=n31 ngauss=6 $end
 $guess guess=huckel $end
 $data
malonaldehyde
C1
C   6.0    0.551300   -0.156677   -0.076981
O   8.0   -0.838669    0.073914    0.107605
H   1.0    1.042236    0.839935   -0.082809
H   1.0    0.667328   -0.622894   -1.078705
H   1.0    0.900848   -0.726929    0.810120
H   1.0   -1.257858   -0.769653    0.112671
 $end