/// The lowest level of the Kanji exam, learned in the 1st year of Japanese
/// elementary school.
pub const LEVEL_10: &str = "\
一七三上下中九二五人休先入八六円出力十千口右名四土夕大天女子字学小山川左年手文日\
早月木本村林校森正気水火犬玉王生田男町白百目石空立竹糸耳花草虫見貝赤足車金雨青音";

/// These are learned in the 2nd year of Japanese elementary school.
pub const LEVEL_09: &str = "\
万丸交京今会体何作元兄光公内冬刀分切前北午半南原友古台合同回図国園地場声売夏外多\
夜太妹姉室家寺少岩工市帰広店弓引弟弱強当形後心思戸才教数新方明星春昼時晴曜書朝来\
東楽歌止歩母毎毛池汽活海点父牛理用画番直矢知社秋科答算米紙細組絵線羽考聞肉自船色\
茶行西親角言計記話語読谷買走近通週道遠里野長門間雪雲電頭顔風食首馬高魚鳥鳴麦黄黒";

/// These are learned in the 3rd year of Japanese elementary school.
pub const LEVEL_08: &str = "\
丁世両主乗予事仕他代住使係倍全具写列助勉動勝化区医去反取受号向君味命和品員商問坂\
央始委守安定実客宮宿寒対局屋岸島州帳平幸度庫庭式役待急息悪悲想意感所打投拾持指放\
整旅族昔昭暑暗曲有服期板柱根植業様横橋次歯死氷決油波注泳洋流消深温港湖湯漢炭物球\
由申界畑病発登皮皿相県真着短研礼神祭福秒究章童笛第筆等箱級終緑練羊美習者育苦荷落\
葉薬血表詩調談豆負起路身転軽農返追送速進遊運部都配酒重鉄銀開院陽階集面題飲館駅鼻";

/// These are learned in the 4th year of Japanese elementary school.
pub const LEVEL_07: &str = "\
不争井付令以仲伝位低佐例便信倉候借健側働億兆児共兵典冷初別利刷副功加努労勇包卒協\
単博印参司各周唱器固城埼塩変夫失奈好媛季孫完官害富察岐岡崎巣差希席帯底府康建径徒\
徳必念愛成戦折挙改敗散料旗昨景最望未末札材束松果栃栄案梅梨械極標機欠残氏民求沖治\
法泣浅浴清満滋漁潟灯無然焼照熊熱牧特産的省祝票種積競笑管節約結給続縄置群老臣良芸\
芽英茨菜街衣要覚観訓試説課議貨賀軍輪辞辺連達選郡量録鏡関阜阪陸隊静順願類飛飯養香\
験鹿";

/// These are learned in the 5th year of Japanese elementary school.
pub const LEVEL_06: &str = "\
久仏仮件任似余価保修個停備像再刊判制則効務勢厚句可史告喜営因団囲圧在均型基堂報境\
墓増士夢妻婦容寄導居属布師常幹序弁張往得復志応快性情態慣技招授採接提損支政故救断\
旧易暴条枝査格桜検構武歴殺毒比永河液混減測準演潔災燃版犯状独率現留略益眼破確示祖\
禁移程税築粉精紀素経統絶綿総編績織罪義耕職肥能脈興舎航術衛製複規解設許証評講謝識\
護豊象財貧責貯貸費貿資賛賞質輸述迷逆造過適酸鉱銅防限険際雑非領額飼";

/// These are learned in the 6th year of Japanese elementary school, the final
/// year before middle school.
///
/// 1,026 Kanji are learned by this point.
pub const LEVEL_05: &str = "\
並乱乳亡仁供俳俵値傷優党冊処券刻割創劇勤危卵厳収后否吸呼善困垂域奏奮姿存孝宅宇宗\
宙宝宣密寸専射将尊就尺届展層己巻幕干幼庁座延律従忘忠恩憲我批承担拝拡捨探推揮操敬\
敵映晩暖暮朗机枚染株棒模権樹欲段沿泉洗派済源潮激灰熟片班異疑痛皇盛盟看砂磁私秘穀\
穴窓筋策簡糖系紅納純絹縦縮署翌聖肺胃背胸脳腸腹臓臨至舌若著蒸蔵蚕衆裁装裏補視覧討\
訪訳詞誌認誕誠誤論諸警貴賃退遺郵郷針銭鋼閉閣降陛除障難革頂預骨";

/// These are learned in middle school.
pub const LEVEL_04: &str = "\
丈与丘丹乾互介仰伺依侵俗倒偉傍傾僧儀兼冒凡凶刈到刺剣剤劣勧匹占即却及叫召吐含吹咲\
唐嘆噴圏坊執堅堤塔壁壊壱奇奥奴妙姓威娘婚寂寝尋尽尾屈峠峰巡巨帽幅幾床弐弾彩影彼征\
御微徴忙怒怖恋恐恒恥恵悩惑惨慎慢慮憶戒戯扇払扱抗抜抱抵押拍拓拠振捕掘描握援搬摘撃\
攻敏敷斜旨旬是普暇暦曇更替朱朽杯枯柄柔桃欄歓歳殖殿汗汚沈沢沼況泊浜浮浸涙淡添渡溶\
滴漫澄濁濃為烈煙煮燥爆狂狩狭猛獣獲玄珍環甘畳疲療皆盆盗監盤盾眠瞬矛砲祈秀称稲稿突\
端箇範粒紋紫紹絡継維網緯縁繁繰罰翼耐肩肪胴脂脚脱腐腕腰膚致舗舞舟般芋芝茂荒菓蓄薄\
薪被襲触訴詰詳誇誉謡豪販賦贈越趣距跡跳踊踏躍軒較載輝輩込迎迫逃透途遅違遣避郎釈鈍\
鉛鋭鎖鑑闘陣陰隠隣隷雄雅雌離雷需震霧露響項頼飾駆騒驚髪鬼鮮麗黙鼓齢";

/// These are learned by the end of middle school.
pub const LEVEL_03: &str = "\
乏乙了企伏伐伴伸佳侍促倣倹偶催債克免冗冠凍凝刑削励勘募匠匿卑卓卸厘又双吉吏哀哲啓\
喚喫嘱坑埋塊塗墜墨墳墾壇奉契奪如妨姫娯婆婿嫁嬢孔孤宴審寿封尿岳峡崩巧帆帝幻幽廉廊\
弧彫徐忌怠怪恨悔悟悦惜愚慈慌慕慨慰憂憎憩房抑択抽拘掃掌排掛控措掲揚換揺携搾摂撮擁\
擦敢斗斤斥施既昇晶暫架某桑棄棋楼概欧欺殊殴没泌浪湾湿滅滑滝滞漂漏潜潤濫瀬炉炊炎焦\
牲犠猟獄甲畔畜疾痘癖硬碑礎祉稚穂穏穫窒符篤簿籍粋粗粘糧紛紺絞綱緊締緩縛縫繕翻聴肝\
胆胎胞脅膜膨芳苗菊華葬藩虐虚蛮衝衰袋裂裸覆訂託詠該誘請諮諾謀譲豚貫賊賢赦赴超軌軸\
辛辱逮遂遇遭遵邦邪郊郭酔酵鋳錠錬錯鍛鎮鐘閲阻陪陳陵陶隆随隔隻雇零霊顧飽餓駐騎髄魂\
魅魔鯨鶏";

/// These are learned by the end of high school.
pub const LEVEL_02_PRE: &str = "\
且丙亜享亭仙伯但併侮侯俊俸倫偏偵偽傑傘僕僚儒償充准凸凹刃剖剛剰劾勅勲升厄叔叙吟呈\
呉唆唇唯喝喪嗣嚇囚坪垣培堀堕堪塀塁塑塚塾壌壮奔奨妃妄妊妥姻娠媒嫌嫡宜宰宵寛寡寧寮\
尉尚尼履屯岬崇帥幣庶庸廃廷弊弔弦彰循徹忍恭悠患悼惰愁愉慶憤憾懇懐懲懸戻扉扶抄把披\
抹拐拒拙括拷挑挟挿捜据搭摩撤撲擬斉斎旋昆暁曹朕朴杉析枠枢柳栓核栽桟棚棟棺槽款殉殻\
汁江沸泡泥泰洞津洪浄浦涯涼淑渇渉渋渓渦溝漆漠漬漸濯煩爵猫献猶猿珠琴璽瓶甚畝疎疫症\
痢痴癒盲眺睡督矯砕硝硫碁磨礁祥禅禍租秩稼窃窮窯竜筒粛粧糾紡索累紳緒繊繭缶罷羅翁耗\
肌肖肢肯臭舶艇艦茎荘菌薦薫藻虜虞蚊蛇蛍融衡衷裕褐褒襟覇訟診詐詔誓諭謁謄謙謹譜貞貢\
賄賓賜賠購践軟轄迅迭逐逓逝逸遍遮遷還邸酌酢酪酬酷醜醸釣鈴鉢銃銘閑閥附陥隅雰霜靴韻\
頑頒頻顕飢駄騰麻";

/// These are considered "standard adult level".
pub const LEVEL_02: &str = "\
串丼乞亀伎侶俺傲僅冥冶凄刹剥勃勾匂叱呂呪咽哺唄唾喉喩嗅嘲堆塞填妖妬嫉宛尻崖嵐巾弄\
弥彙怨恣惧慄憧憬戚戴拉拭拳拶挨挫捉捗捻摯斑斬旦旺昧曖曽枕柵柿桁梗椅椎楷毀氾汎汰沃\
沙淫湧溺潰煎爪爽牙狙玩瑠璃璧瓦畏畿痕痩瘍眉睦瞭瞳稽窟箋箸籠綻緻罵羞羨肘股脇脊腎腫\
腺膝膳臆臼舷艶芯苛萎葛蓋蔑蔽藍藤虎虹蜂蜜袖裾訃詣詮誰諦諧謎貌貪貼賂賭踪蹴辣遜遡那\
酎醒采釜錦錮鍋鍵鎌闇隙韓頃須頓頬顎餅餌駒骸鬱鶴麓麺";

/// The second-highest level, which adds an additional 1,238 characters on top
/// of the standard 常用 set.
pub const LEVEL_01_PRE: &str = "\
丑丞乃之乍乎乘也亂云亘亙些亞亥亦亨亮什仇仔伊伍伶伽佃佑佛佼侃來俄俠俣俱倂倖倦倭假\
偓偲傭傳僑僞價僻儉儘儲允兇兎兒兜兩其册冴凌凧凪凰凱函剃剩劃劉劍劑劫勞勳勵勸勺勿匁\
匙匝匡匪區卜卦卯卷卽卿厨厩厭參叉叛叡叢叩只叶吃吊吋吞吠吻吾呆咳哉哨哩啄啐啞喋喧喬\
單喰嘉嘗嘩噂噌噓噸噺嚙嚴囊囑圃圈國圍圓圖團圭坐坤坦垢埠埴堯堰堵堺塙塵增墮壓壕壘壞\
壤壬壯壹壺壻壽夙夷奄套奧奬妓妾姐姑姥姦姪姶娃娩娼婁嬉嬬嬰孃孜孟學宋宍宏宕宥寅寓寢\
實寫寬寵寶將專對尖尤尭屆屍屑屢屬岨岱峨峯峻峽嵩嵯嶋嶺嶽巌巖巢巳巴巷巽帖帶幌幡庄庇\
庖庚庵廓廟廠廢廣廳廻廿弗弘弛弼彈彊彌彦彪彬徑從徵德徽忽怜怯恆恕恢恰悅悉悌悶惇惚惟\
惠惡惣惱惹愈愼慘慧慾憐應懷戀戊戎或戟戰戲戾托扮拂拔拜按挺挽挾捌捧捲捷捺掠掩掬揃插\
揖揭搔搖搜摑摸摺撒撚撞撫播撰擇擊擔據擢擧擴擾攝攪收效敍敎敕敦數斌斐斡斧斯斷於旭昂\
昌昏晃晉晋晒晚晝晦智暢曆曉曙曝曳曾會朋朔李杏杓杖杜杢杭杵杷枇柁柊柏柑柘柚柴柾栂栖\
栗栴桂桐桓桔桶梁梓條梢梧梯梱梶棉棧棲椀椋椙椛椴椿楊楓楕楚楠楢楯楳榊榎榛榮槇槌槍槙\
槪槻樂樋樓樗樞樟樣樫樵樺樽橘橡橫橿檀檎檜檢檮櫓櫛櫻權欣欽歎歐歡此步歪歷歸殆殘殼毅\
毆每毘氣汀汐汝汲沌沒沓沫洛洩洲浩浬涉涌淀淋淘淚淨淳淵淸淺渚渠渥渴湊湘湛溜溢溪溫滯\
滿漉漑漕漣潑潛澁澗澤澱濕濟濠濡濤濱瀆瀕瀞瀦瀧瀨灌灘灣灸灼烏烹焚焰煉煤煽熔燈燐燒燕\
營燦燭爐爭爲爺爾牌牒牝牟牡牢牽犀犧狀狐狗狛狸狹狼狽猪猷獅獨獵獸獻玖玲珂珊珪琉琢琳\
琵琶瑚瑛瑞瑤瑳瓜瓢甁甑甜甥甫畠畢畦畫當畷疊疋疏疹痔瘦癌癡發皐盃盈盜盡眞瞥矧矩砥砦\
砧硏硯硲碇碍碎碓碗碧碩磐磯礦礪祁祇祐祕祿禄禎禦禪禮禰禱禽禾禿秤秦稀稔稗稜稻穆穎穗\
穣穩穰穿窄窗窪窺竈竊竝竣竪竺竿笈笠笥笹筈筏筑箔箕箭篇篠篦簞簸簾籾粁粂粍粕粟粥粹糊\
糎糞糟糠紐紗紘紬絃絢絲經綜綠綬綴綾緋緖緣緬縞縣縱總繡繩繪繫繼纂續纏纖缺罐罫翠翫翰\
耀而耶耽聡聯聰聲聽聾肅肇肋肱肴胡胤脆脹腔腦腿膏膽膿臟臥臺與舊舍舖舘舛舜舵艮艷芙芥\
芭芹苅苑苓苔苧苫茄茅茜茸荊荏荻莊莖莞莫菅菖菩菰菱萄萊萌萩萬萱葎葡董葦葱葵葺蒐蒔蒙\
蒜蒲蒼蓉蓑蓬蓮蔀蔓蔚蔣蔦蔭蕃蕉蕊蕎蕗蕨蕩蕪薗薙薩薯薰藁藏藝藥藪藷蘇蘭處虛號虻蚤蛋\
蛙蛛蛤蛭蛸蛾蜎蜘蝕蝦蝶螢螺蟬蟲蟹蟻蠅蠣蠶蠻衞衿袈袴袷裝裟裡裳襃襖覗覺覽觀觸訊訣註\
詑詫誹誼諏諒諜諫諺謂謠謬證譯譽讀讃變讓豐豫豹貰貳賑賣賤賴贊贋赫趨跨踐蹄蹟軀輔輕輯\
輿轉轍轟轡辨辭辯辰辻辿迂迄迦迺逗這逢逼遁遙遞遥遲遼邊邑郁郞鄕鄭鄰酉酋醇醉醍醐醫醬\
醱釀釋釘釦釧鈷鉤鉦鉾銑銚鋒鋤鋪鋲鋸錄錆錐錘錢錨錫鍊鍍鍔鍬鍾鎗鎚鎧鎭鏑鐙鐵鐸鑄鑓鑛\
閃閏閤關阿陀陷隈隨險隱隸隼雀雁雙雛雜雫霞靈靑靖靜靱鞄鞍鞘鞠鞭韃韮頁頗頸顏顚顯飮飴\
餐餘餠饗馨馳馴駁駈駕駿騷驅驗驛髓體髭髮鬪魁魯鮎鮒鮪鮫鮭鯉鯖鯛鰍鰐鰭鰯鰹鰺鰻鱒鱗鳩\
鳳鳶鴇鴛鴦鴨鴫鴻鵜鵠鵡鵬鶯鷄鷗鷲鷹鷺鸚鹼鹽麒麟麥麴麵麿黃黍黑默黛點黨鼎鼠齊齋齒齡\
龍龜龝欄廊朗虜殺類隆塚晴猪益神祥福靖精羽諸都飯飼館侮僧免勉勤卑喝嘆器塀墨層悔慨憎\
懲敏既暑梅海渚漢煮琢碑社祉祈祐祖祝禍禎穀突節練繁署者臭著褐視謁謹賓贈逸難響頻";

/// The highest examination level, which nearly doubles the existing set with an
/// additional 2,532 unique characters.
///
/// However, the official listing itself contains 2,928 characters. The
/// difference (396) are characters listed in both levels Pre-One and One. For
/// the purpose of lookups via `by_level`, such Kanji will appear as `PreOne`.
pub const LEVEL_01: &str = "\
乂几匕匚丫于兀孑孒尸已幺弋丐亢仂仄仆仍卅夬夭尹弌弖戈扎曰毋丕丱仗仞仟册刋匆卉卮叨\
叭叮叺圦夲孕屶弍戉朮艾辷价伉冱凩刎刔匈卍吁夸奸屹幵忖戌戍扛扞扠扣扨收朶朸朿汕犲聿\
艸芒阡羽估佇佗佚佛佝佞兌冏刪劬劭匣吝吩听吭吮吶吼吽呎呏圻址坎坏壯夾妝妣孚孛尨屁岌\
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癴鑿钁鸛爨驪鸞麤";

#[cfg(test)]
mod tests {
    use super::*;
    use std::collections::HashSet;

    #[test]
    fn kanji_list_lengths() {
        assert_eq!(80, LEVEL_10.chars().count());
        assert_eq!(160, LEVEL_09.chars().count());
        assert_eq!(200, LEVEL_08.chars().count());
        assert_eq!(202, LEVEL_07.chars().count());
        assert_eq!(193, LEVEL_06.chars().count());
        assert_eq!(191, LEVEL_05.chars().count());
        assert_eq!(313, LEVEL_04.chars().count());
        assert_eq!(284, LEVEL_03.chars().count());
        assert_eq!(328, LEVEL_02_PRE.chars().count());
        assert_eq!(185, LEVEL_02.chars().count());
        assert_eq!(1238, LEVEL_01_PRE.chars().count());
        assert_eq!(2928, LEVEL_01.chars().count());
    }

    #[test]
    fn all_unique() {
        let ks = vec![
            LEVEL_10,
            LEVEL_09,
            LEVEL_08,
            LEVEL_07,
            LEVEL_06,
            LEVEL_05,
            LEVEL_04,
            LEVEL_03,
            LEVEL_02_PRE,
            LEVEL_02,
            LEVEL_01_PRE,
            // LEVEL_01,
        ];

        let as_set: HashSet<_> = ks.concat().chars().collect();
        assert_eq!(as_set.len(), ks.concat().chars().count());
    }

    #[test]
    fn elementary() {
        let ks = vec![LEVEL_10, LEVEL_09, LEVEL_08, LEVEL_07, LEVEL_06, LEVEL_05];

        assert_eq!(1026, ks.concat().chars().count());
    }

    #[test]
    fn jouyou() {
        let ks = vec![
            LEVEL_10,
            LEVEL_09,
            LEVEL_08,
            LEVEL_07,
            LEVEL_06,
            LEVEL_05,
            LEVEL_04,
            LEVEL_03,
            LEVEL_02_PRE,
            LEVEL_02,
        ];

        assert_eq!(2136, ks.concat().chars().count());
    }
}