%chk=nh3_highsym.chk
%mem=100MB
%nproc=1
#opt hf/3-21G  

Title Card Required

0 1
 N  
 X  1   2.0
 H  1   RH1   2   AHNX1
 H  1   RH1   2   AHNX1   3   THNXH1
 H  1   RH1   2   AHNX1   3   -THNXH1

 RH1     1.01
 AHNX1   90.0
 THNXH1  120.0