1> bar 2analyze(bar) = st:bar <BAR <ZERO>> 3analyze(bar) = st:bar <BAR > 4analyze(bar) = st:bar <BAR <ZERODERIV> <ZERO>> 5analyze(bar) = st:bar <BAR <ZERODERIV> > 6stem(bar) = bar 7> foo 8analyze(foo) = st:foo <FOO > 9stem(foo) = foo 10> barbaz 11analyze(barbaz) = st:bar <BAR <DERIV> <ZERO>> 12analyze(barbaz) = st:bar <BAR <DERIV> > 13stem(barbaz) = bar 14