S i <chr_var letter="s" var="long">∫</chr_var>an br<chr_abbr type="reg" class="dc" expan="un" cert="no">u-hbar</chr_abbr>cha <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> ne di<chr_var letter="s" var="long">∫</chr_var>t mot 