quantrung9

class VietnameseService
  VIETNAMESE_CONVERT_TABLE = {
    "a" => ["à","á","ạ","ả","ã","â","ầ","ấ","ậ","ẩ","ẫ","ă","ằ","ắ","ặ","ẳ","ẵ"],
    "e" => ["è","é","ẹ","ẻ","ẽ","ê","ề","ế","ệ","ể","ễ"],
    "i" => ["ì","í","ị","ỉ","ĩ"],
    "o" => ["ò","ó","ọ","ỏ","õ","ô","ồ","ố","ộ","ổ","ỗ","ơ","ờ","ớ","ợ","ở","ỡ"],
    "u" => ["ù","ú","ụ","ủ","ũ","ư","ừ","ứ","ự","ử","ữ"],
    "y" => ["ỳ","ý","ỵ","ỷ","ỹ"],
    "d" => ["đ"],
    "A" => ["À","Á","Ạ","Ả","Ã","Â","Ầ","Ấ","Ậ","Ẩ","Ẫ","Ă","Ằ","Ắ","Ặ","Ẳ","Ẵ"],