title check pure hydrogen Stromgren sphere
c the answer is R(Stromgren) = 4.16E17 cm
hden 4
sphere static
radius 16
blackbody 50,000k
q(h) 49
stop eden 3.
constant temper 7500
abundances all -10
print last iteration
iterate
punch overview last file="strom.ovr"
punch results last file="strom.rlt"
c strom.in