Bagobo Diamonds (p. 43)

  $\displaystyle \Circled{1}\ \underline{O}. {A}$    
  % latex2html id marker 2852
$\displaystyle \Circled{2}\ \ensuremath{\Box}5 \ensuremath{\vert}\ $    
  % latex2html id marker 2853
$\displaystyle \Circled{3}\ \overleftarrow{2}(\underline{1f}) \ensuremath{\char93 }: \ensuremath{\Box}1$    
$\displaystyle %[\equiv \overrightarrow{1\Loop} \to 2]\\
$ % latex2html id marker 2855
$\displaystyle \Circled{4}\ \overrightarrow{1}(\ell2n) : \overrightarrow{1}(\underline{\ell2f})\ \ensuremath{\char93 }$    
  % latex2html id marker 2856
$\displaystyle \Circled{5}\ \overrightarrow{1}(u2n) : \overrightarrow{1}(\underline{u2f})\ \ensuremath{\char93 }$    
  % latex2html id marker 2857
$\displaystyle \Circled{6}\ \overleftarrow{3}(u2n) : \overleftarrow{3}(\underline{\ell2n})\ \ensuremath{\char93 }$    
  $\displaystyle \Circled{7}\ N1$    
  $\displaystyle \Circled{8}\ \textrm{$>L$\ relative to $R$\ to extend.}$