Declarations -- additional variable declarations
Private Sub optAri
Private Sub optTau
Private Sub optGem
Private Sub optCan
Private Sub optLeo
Private Sub optVir
Private Sub optLib
Private Sub optSco
Private Sub optSag
Private Sub optCap
Private Sub optAqu
Private Sub optPis
Private Sub cmdOK -- initialize, make first guess
Private Sub cmd Yes -- revise interval, make guess
Private Sub cmd No -- revise interval, make guess
Private Sub guess -- formulate guess