Common typos: yl19977dl19977dy19977dyl9977dyl1977dyl1997syl19977fyl19977eyl19977xyl19977cyl19977ryl19977dul19977dtl19977dhl19977d6l19977d7l19977dgl19977dyk19977dyo19977dyp19977dyl29977dylq9977dylw9977dyl10977dyl18977dyl1o977dyl1i977dyl19077dyl19877dyl19o77dyl19i77dyl19987dyl19967dyl199u7dyl199y7dyl19978dyl19976dyl1997udyl1997yydl19977dly19977dy1l9977dyl91977dyl19797sdyl19977dsyl19977fdyl19977dfyl19977edyl19977deyl19977xdyl19977dxyl19977cdyl19977dcyl19977rdyl19977dryl19977duyl19977dyul19977dtyl19977dytl19977dhyl19977dyhl19977d6yl19977dy6l19977d7yl19977dy7l19977dgyl19977dygl19977dykl19977dylk19977dyol19977dylo19977dypl19977dylp19977dyl219977dyl129977dylq19977dyl1q9977dylw19977dyl1w9977dyl109977dyl190977dyl189977dyl198977dyl1o9977dyl19o977dyl1i9977dyl19i977dyl199077dyl199877dyl199o77dyl199i77dyl199787dyl199677dyl199767dyl199u77dyl1997u7dyl199y77dyl1997y7dyl199778dyl199776dyl19977udyl19977yddyl19977dyyl19977dyll19977dyl119977dyl199977dyl199777