$ grep -aPih "text/html\s*;\s*charset\s*=\s*[\"']?(866|ansi_x3.4-1986|asmo-708|cn-gb|cp1250|cp1251|cp1252|cp1254|cp1257|cp367|cp50220|cp51932|cp819|cp932|cp936|csascii|cscp50220|cscp51932|cseuckr|cseucpkdfmtjapanese|csibm866|csinvariant|csiso646basic1983|csiso88596e|csiso88596i|iso-8859-6-i|csiso88598e|csiso88598i|cskoi8r|csunicode|csunicode11|csunicode11utf7|utf-7|csunicodeascii|csunicodejapanese|csunicodelatin1|csviscii|viscii|cswindows31j|euc-cn|euc-tw|euc-tw|extended_unix_code_packed_format_for_japanese|ibm367|ibm819|invariant|iso-10646|iso-10646-j-1|iso-10646-ucs-2|iso-10646-ucs-basic|iso-10646-unicode-latin1|iso-2022-cn|iso-2022-cn|iso-2022-jp-1|iso-2022-jp-1|iso-8859-6-e|iso-8859-6-i|iso-8859-6-i|iso-8859-8-e|iso-celtic|iso-ir-100|iso-ir-199|iso-ir-226|iso-ir-6|iso646-us|iso8859-11|iso8859-12|iso-8859-12|iso8859-13|iso8859-15|iso8859-16|iso8859-3|iso8859-4|iso8859-5|iso8859-6|iso8859-7|iso8859-8|iso8859-9|iso88591|iso885910|iso885911|iso885912|iso-8859-12|iso885913|iso885914|iso885915|iso885916|iso88592|iso88593|iso88594|iso88595|iso88596|iso88597|iso88598|iso88599|iso_646.basic:1983|iso_646.irv:1991|iso_8859-10:1992|iso_8859-14|iso_8859-14:1998|iso_8859-16|iso_8859-16:2001|iso_8859-1:1987|iso_8859-2:1987|iso_8859-3:1988|iso_8859-4:1988|iso_8859-5:1988|iso_8859-6-e|iso_8859-6-i|iso-8859-6-i|iso_8859-6:1987|iso_8859-7:1987|iso_8859-8-e|iso_8859-8-i|iso_8859-8:1988|iso_8859-9|iso_8859-9:1989|ks_c_5601-1987|l10|l8|latin-9|latin10|latin8|microsoft-cp1250|microsoft-cp1251|microsoft-cp1252|microsoft-cp1253|microsoft-cp1254|microsoft-cp1255|microsoft-cp1256|microsoft-cp1257|microsoft-cp1258|ms932|ms936|ref|sjis|tis-620-2533|unicode-1-1|unicode-1-1-utf-7|utf-7|us|utf-7|utf-7|viscii|viscii|windows-936|x-cp1252|x-cp1253|x-cp1254|x-cp1255|x-cp1256|x-cp1257|x-cp1258|x-mac-ce|x-mac-ce|x-mac-greek|x-mac-greek|x-mac-turkish|x-mac-turkish|x-user-defined|x-user-defined)" web200904 > labels.txt