S an<chr_var letter="s" var="long">∫</chr_var> ranprener <chr_abbr type="frq" class="ss" expan="et" cert="yes">et2</chr_abbr> <chr_var letter="s" var="long">∫</chr_var>an<chr_var letter="s" var="long">∫</chr_var> vant<chr_abbr type="reg" class="dc" expan="an" cert="no">a-hbar</chr_abbr>ce 