Common typos: xbubbleassxxxxubbleassxxxxbbbleassxxxxbubleassxxxxbubbeassxxxxbubblassxxxxbubblessxxxxbubbleasxxxxbubbleassxzxbubbleassxxcxbubbleassxxsxbubbleassxxdxbubbleassxxxzbubbleassxxxcbubbleassxxxsbubbleassxxxdbubbleassxxxxnubbleassxxxxvubbleassxxxxhubbleassxxxxgubbleassxxxxbibbleassxxxxbybbleassxxxxbjbbleassxxxxb7bbleassxxxxb8bbleassxxxxbhbbleassxxxxbunbleassxxxxbuvbleassxxxxbuhbleassxxxxbugbleassxxxxbubnleassxxxxbubvleassxxxxbubhleassxxxxbubgleassxxxxbubbkeassxxxxbubboeassxxxxbubbpeassxxxxbubblwassxxxxbubblrassxxxxbubbl3assxxxxbubbldassxxxxbubblsassxxxxbubbl4assxxxxbubblesssxxxxbubbleqssxxxxbubblezssxxxxbubblewssxxxxbubbleaasxxxxbubbleadsxxxxbubbleawsxxxxbubbleazsxxxxbubbleaxsxxxxbubbleaesxxxxbubbleasaxxxxbubbleasdxxxxbubbleaswxxxxbubbleaszxxxxbubbleasxxxxxbubbleasexxxxbubbleasszxxxbubbleasscxxxbubbleasssxxxbubbleassdxxxbubbleassxzxxbubbleassxcxxbubbleassxsxxbubbleassxdxbxubbleassxxxxubbbleassxxxxbbubleassxxxxbublbeassxxxxbubbelassxxxxbubblaessxxxxbubblesasxxxxbubbleasxsxzxxbubbleassxxxzxbubbleassxxcxxbubbleassxxxcxbubbleassxxsxxbubbleassxxxsxbubbleassxxdxxbubbleassxxxdxbubbleassxxxxzbubbleassxxxxcbubbleassxxxxsbubbleassxxxxdbubbleassxxxxnbubbleassxxxxbnubbleassxxxxvbubbleassxxxxbvubbleassxxxxhbubbleassxxxxbhubbleassxxxxgbubbleassxxxxbgubbleassxxxxbiubbleassxxxxbuibbleassxxxxbyubbleassxxxxbuybbleassxxxxbjubbleassxxxxbujbbleassxxxxb7ubbleassxxxxbu7bbleassxxxxb8ubbleassxxxxbu8bbleassxxxxbuhbbleassxxxxbunbbleassxxxxbubnbleassxxxxbuvbbleassxxxxbubvbleassxxxxbubhbleassxxxxbugbbleassxxxxbubgbleassxxxxbubbnleassxxxxbubbvleassxxxxbubbhleassxxxxbubbgleassxxxxbubbkleassxxxxbubblkeassxxxxbubboleassxxxxbubbloeassxxxxbubbpleassxxxxbubblpeassxxxxbubblweassxxxxbubblewassxxxxbubblreassxxxxbubblerassxxxxbubbl3eassxxxxbubble3assxxxxbubbldeassxxxxbubbledassxxxxbubblseassxxxxbubblesassxxxxbubbl4eassxxxxbubble4assxxxxbubbleasssxxxxbubbleqassxxxxbubbleaqssxxxxbubblezassxxxxbubbleazssxxxxbubbleawssxxxxbubbleaassxxxxbubbleasasxxxxbubbleadssxxxxbubbleasdsxxxxbubbleaswsxxxxbubbleaszsxxxxbubbleaxssxxxxbubbleasxsxxxxbubbleaessxxxxbubbleasesxxxxbubbleassaxxxxbubbleassdxxxxbubbleasswxxxxbubbleasszxxxxbubbleassxxxxxbubbleassexxxxbubbleassxzxxxbubbleasscxxxxbubbleassxcxxxbubbleassxsxxxbubbleassxdxxxbubbleassxxzxxbubbleassxxcxxbubbleassxxsxxbubbleassxxdxxxbubbleassxxxxbbubbleassxxxxbuubbleassxxxxbubbbleassxxxxbubblleassxxxxbubbleeassxx