Corrections (b/c too late to edit): (1) The flag isn't for bc, of course; it's for units. I'm always running the wrong one, so no surprise I mixed them up agai

Corrections (b/c too late to edit): (1) The flag isn't for bc, of course; it's for units. I'm always running the wrong one, so no surprise I mixed them up again. (2) Should read "look at them to understand" near the end.