\BOOKMARK [1][-]{section.1}{Introduction}{}% 1
\BOOKMARK [1][-]{section.2}{Motzkin tunnel polynomials}{}% 2
\BOOKMARK [2][-]{subsection.2.1}{Basic definitions}{section.2}% 3
\BOOKMARK [2][-]{subsection.2.2}{Specializations}{section.2}% 4
\BOOKMARK [2][-]{subsection.2.3}{A joint distribution}{section.2}% 5
\BOOKMARK [1][-]{section.3}{Catalan tunnel polynomials}{}% 6
\BOOKMARK [2][-]{subsection.3.1}{Catalan specializations}{section.3}% 7
\BOOKMARK [2][-]{subsection.3.2}{A joint Catalan distribution}{section.3}% 8
\BOOKMARK [1][-]{section.4}{Binary trees}{}% 9
\BOOKMARK [1][-]{section.5}{Partial and free Motzkin paths}{}% 10
\BOOKMARK [1][-]{section.6}{Acknowledgments}{}% 11