I got: A, ABBR, ACRONYM, APPLET, AREA, B, BASE, BASEFONT, BIG, BLOCKQUOTE, BODY, BR, BUTTON, CAPTION, CENTER, CITE, CODE, COL, COLGROUP, DD, DEL, DFN, DIR, DIV, DL, DT, EM, FIELDSET, FONT, FORM, FRAME, FRAMESET, H1, H2, H3, H4, H5, H6, HEAD, HR, HTML, I, IFRAME, INPUT, INS, ISINDEX, KBD, LABEL, LEGEND, LI, LINK, MAP, MENU, META, NOFRAMES, NOSCRIPT, OBJECT, OL, OPTGROUP, OPTION, P, PARAM, PRE, Q, S, SAMP, SCRIPT, SELECT, SMALL, SPAN, STRIKE, STRONG, STYLE, SUB, SUP, TABLE, TBODY, TD, TEXTAREA, TFOOT, TH, THEAD, TITLE, TR, TT, U, UL, and VAR
I forgot: ADDRESS, BDO, and IMG. Yes, IMG.
To be fair, this was probably the 8th try. It helps to group them into forms, block/inline, quoting, embedding/linking, framing, lists, data/code display, etc.