michael@0: > bar
michael@0: analyze(bar) =  st:bar <BAR <ZERO>>
michael@0: analyze(bar) =  st:bar <BAR >
michael@0: analyze(bar) =  st:bar <BAR <ZERODERIV> <ZERO>>
michael@0: analyze(bar) =  st:bar <BAR <ZERODERIV> >
michael@0: stem(bar) = bar
michael@0: > foo
michael@0: analyze(foo) =  st:foo <FOO >
michael@0: stem(foo) = foo
michael@0: > barbaz
michael@0: analyze(barbaz) =  st:bar <BAR <DERIV> <ZERO>>
michael@0: analyze(barbaz) =  st:bar <BAR <DERIV> >
michael@0: stem(barbaz) = bar