rt = rt.replace(u”ả”, “a”)
rt = rt.replace(u”ã”, “a”)
rt = rt.replace(u”ạ”, “a”)
rt = rt.replace(u”à”, “a”)
rt = rt.replace(u”á”, “a”)

rt = rt.replace(u”â”, “a”)
rt = rt.replace(u”ẩ”, “a”)
rt = rt.replace(u”ẫ”, “a”)
rt = rt.replace(u”ậ”, “a”)
rt = rt.replace(u”ầ”, “a”)
rt = rt.replace(u”ấ”, “a”)

rt = rt.replace(u”ẻ”, “e”)
rt = rt.replace(u”ẽ”, “e”)
rt = rt.replace(u”ẹ”, “e”)
rt = rt.replace(u”è”, “e”)
rt = rt.replace(u”é”, “e”)

rt = rt.replace(u”ê”, “e”)
rt = rt.replace(u”ể”, “e”)
rt = rt.replace(u”ễ”, “e”)
rt = rt.replace(u”ệ”, “e”)
rt = rt.replace(u”ề”, “e”)
rt = rt.replace(u”ế”, “e”)

rt = rt.replace(u”ỉ”, “i”)
rt = rt.replace(u”ĩ”, “i”)
rt = rt.replace(u”ị”, “i”)
rt = rt.replace(u”ì”, “i”)
rt = rt.replace(u”í”, “i”)

rt = rt.replace(u”ỏ”, “o”)
rt = rt.replace(u”õ”, “o”)
rt = rt.replace(u”ọ”, “o”)
rt = rt.replace(u”ò”, “o”)
rt = rt.replace(u”ó”, “o”)

rt = rt.replace(u”ô”, “o”)
rt = rt.replace(u”ổ”, “o”)
rt = rt.replace(u”ỗ”, “o”)
rt = rt.replace(u”ộ”, “o”)
rt = rt.replace(u”ồ”, “o”)
rt = rt.replace(u”ố”, “o”)

rt = rt.replace(u”ơ”, “o”)
rt = rt.replace(u”ở”, “o”)
rt = rt.replace(u”ỡ”, “o”)
rt = rt.replace(u”ợ”, “o”)
rt = rt.replace(u”ờ”, “o”)
rt = rt.replace(u”ớ”, “o”)

rt = rt.replace(u”ủ”, “u”)
rt = rt.replace(u”ũ”, “u”)
rt = rt.replace(u”ụ”, “u”)
rt = rt.replace(u”ù”, “u”)
rt = rt.replace(u”ú”, “u”)

rt = rt.replace(u”ư”, “u”)
rt = rt.replace(u”ử”, “u”)
rt = rt.replace(u”ữ”, “u”)
rt = rt.replace(u”ự”, “u”)
rt = rt.replace(u”ừ”, “u”)
rt = rt.replace(u”ứ”, “u”)

rt = rt.replace(u”ỷ”, “y”)
rt = rt.replace(u”ỹ”, “y”)
rt = rt.replace(u”ỵ”, “y”)
rt = rt.replace(u”ỳ”, “y”)
rt = rt.replace(u”ý”, “y”)