delim_0 "\\hspace{6pt}\\dotfill\\hspace{6pt}"
delim_1 "\\hspace{6pt}\\dotfill\\hspace{6pt}"
delim_2 "\\hspace{6pt}\\dotfill\\hspace{6pt}"
delim_3 "\\hspace{6pt}\\dotfill\\hspace{6pt}"