as luck would have it, fortuitously, fortunately, luckily

sadly, unfortunately, lamentably, regretfully, thankfully, shamefully, indeed, fortunately, glaringly, inexcusably, unforgivably, moreover, dreadfully, therefore, grievously, unavoidably, depressingly, appallingly, demonstrably, tragically, disappointingly, pathetically, terribly, consequently, embarrassingly, manifestly, frankly, distressingly, inasmuch, egregiously, mercifully, singularly, evidently, painfully, conspicuously, disgracefully, utterly, strangely, frustratingly, laudably, pitifully, undoubtedly, nevertheless, blessedly, unutterably, alack, damnably, unaccountably, profoundly, curiously, abjectly, monumentally, furthermore, miserably, ironically, wholly, insultingly, superficially, peculiarly, paradoxically, horribly, woefully, perforce, inevitably, simply, disastrously, certainly, unreservedly, luckily, apathetically, maddeningly, bizarrely, scarcely, laughably, worryingly, annoyingly, perplexingly, signally, nobly, scandalously, irredeemably, admittedly, patently, predictably, bewilderingly, undeniably, substantively, notwithstanding, however, wretchedly, disturbingly, irretrievably, intolerably, hideously, tiresomely, observably, surely, passingly, horrifically, hence, rightly, nonetheless

alas, unfortunately, unluckily