H
B   1 bh2     
xx  2 xxb3        1 xxbh3     
N   2 nb4         3 nbxx4         1 dih4   
variables
bh2         1.18781418
nb4         1.27808741
xxb3        1.000000
xxbh3        90.000
nbxx4        90.000
dih4        180.000