Word channel to provide the "first letter" classification filter, the main application rules are as follows:

1. Chinese name: the use of the first Chinese characters Pinyin syllable Latin escaped after the first letter, go to the corresponding "letter".

2. Latin name: the first letter (including the characters of the modified characters) Latin escaped, into the corresponding "letter".

• A：Aa Ａａ Áá Àà Ăă Ắắ Ằằ Ẵẵ Ẳẳ Ââ Ấấ Ầầ Ẫẫ Ẩẩ Ǎǎ Åå Ǻǻ Ää Ǟǟ Ãã Ȧȧ Ǡǡ Ąą Āā Ảả Ȁȁ Ȃȃ Ạạ Ặặ Ậậ Ḁḁ Ⱥⱥ ᶏ Ɐɐ Ɑɑ

• B：Bb Ｂｂ Ḃḃ Ḅḅ Ḇḇ Ƀƀ Ɓɓ Ƃƃ Ꞗꞗ ᵬ ᶀ

• C：Cc Ｃｃ Ćć Ĉĉ Čč Ċċ Çç Ḉḉ Ȼȼ Ƈƈ ɕ

• D：Dd Ｄｄ Ďď Ḋḋ Ḑḑ Ḍḍ Ḓḓ Ḏḏ Đđ Ɖɖ Ɗɗ Ƌƌ ᵭ ᶁ ᶑ ȡ ∂

• E：Ee Ｅｅ Éé Èè Ĕĕ Êê Ếế Ềề Ễễ Ểể Ěě Ëë Ẽẽ Ėė Ȩȩ Ḝḝ Ęę Ēē Ḗḗ Ḕḕ Ẻẻ Ȅȅ Ȇȇ Ẹẹ Ệệ Ḙḙ Ḛḛ Ɇɇ ᶒ ⱸ

• F：Ff Ｆｆ Ḟḟ Ƒƒ ᵮ ᶂ

• G：Gg Ｇｇ Ǵǵ Ğğ Ĝĝ Ǧǧ Ġġ G̃g̃ Ģģ Ḡḡ Ǥǥ Ɠɠ ᶃ

• H：Hh Ｈｈ Ĥĥ Ȟȟ Ḧḧ Ḣḣ Ḩḩ Ḥḥ Ḫḫ H̱ẖ Ħħ Ⱨⱨ

• I：Ii Ｉｉ Í í Ì ì Ĭ ĭ Î î Ǐ ǐ Ïï Ḯḯ Ĩĩ Į į Ī ī Ỉ ỉ Ȉ ȉ Ȋ ȋ Ị ị Ḭ ḭ Ɨ ɨ ᵻ ᶖ İ I I I ꟾ

• J：Jj Ｊｊ Ĵĵ Ɉɉ J̌ǰ ȷ ʝ ɟ ʄ

• K：Kk Ｋｋ Ḱḱ Ǩǩ Ķķ Ḳḳ Ḵḵ Ƙƙ Ⱪⱪ ᶄ Ꝁꝁ K̂k̂

• L：Ll Ｌｌ Ĺĺ Ľľ Ļļ Ḷḷ Ḹḹ Ḽḽ Ḻḻ Łł Ŀŀ Ƚƚ Ⱡⱡ Ɫɫ ɬ ᶅ ɭ ȴ

• M：Mm Ｍｍ Ḿḿ Ṁṁ Ṃṃ ᵯ ᶆ Ɱɱ

• N：Nn Ｎｎ Ńń Ǹǹ Ňň Ññ Ṅṅ Ņņ Ṇṇ Ṋṋ Ṉṉ N̈n̈ Ɲɲ Ƞƞ Ŋŋ Ꞑꞑ ᵰ ᶇ ɳ ȵ

• O：Oo Ｏｏ Óó Òò Ŏŏ Ôô Ốố Ồồ Ỗỗ Ổổ Ǒǒ Öö Ȫȫ Őő Õõ Ṍṍ Ṏṏ Ȭȭ Ȯȯ O͘o͘ Ȱȱ Øø Ǿǿ Ǫǫ Ǭǭ Ōō Ṓṓ Ṑṑ Ỏỏ Ȍȍ Ȏȏ Ơơ Ớớ Ờờ Ỡỡ Ởở Ợợ Ọọ Ộộ Ɵɵ Ɔɔ ⱺ

• P：Pp Ｐｐ Ṕṕ Ṗṗ Ᵽᵽ Ƥƥ P̃p̃ ᵱ ᶈ

• Q：Qq Ｑｑ Ɋɋ Ƣƣ ʠ

• R：Rr Ｒｒ Ŕŕ Řř Ṙṙ Ŗŗ Ȑȑ Ȓȓ Ṛṛ Ṝṝ Ṟṟ Ɍɍ Ɽɽ ᵲ ᶉ ɼ ɾ ᵳ

• S：Ss Ｓｓ Śś Ṥṥ Ŝŝ Šš Ṧṧ Ṡṡẛ Şş Ṣṣ Ṩṩ Șș S̩s̩ ᵴ ᶊ ʂ ȿ

• T：Tt Ｔｔ Ťť Ṫṫ Ţţ Ṭṭ Țț Ṱṱ Ṯṯ Ŧŧ Ⱦⱦ Ƭƭ Ʈʈ T̈ẗ ᵵ ƫ ȶ

• U：Uu Ｕｕ Úú Ùù Ŭŭ Ûû Ǔǔ Ůů Üü Ǘǘ Ǜǜ Ǚǚ Ǖǖ Űű Ũũ Ṹṹ Ųų Ūū Ṻṻ Ủủ Ȕȕ Ȗȗ Ưư Ứứ Ừừ Ữữ Ửử Ựự Ụụ Ṳṳ Ṷṷ Ṵṵ Ʉʉ ᵾ ᶙ

• V：Vv Ｖｖ Ṽṽ Ṿṿ Ʋʋ ᶌ ⱱ ⱴ Ʌʌ

• W：Ww Ｗｗ Ẃẃ Ẁẁ Ŵŵ Ẅẅ Ẇẇ Ẉẉ W̊ẘ Ⱳⱳ

• X：Xx Ｘｘ X́x́ X̂x̂ Ẍẍ X̌x̌ Ẋẋ X̧x̧ X̱x̱ X̣x̣ ᶍ

• Y：Yy Ｙｙ Ýý Ỳỳ Ŷŷ Y̊ẙ Ÿÿ Ỹỹ Ẏẏ Ȳȳ Ỷỷ Ỵỵ Ɏɏ Ƴƴ ʏ

• Z：Zz Ｚｚ Źź Ẑẑ Žž Żż Ẓẓ Ẕẕ Ƶƶ Ȥȥ Ⱬⱬ ᵶ ᶎ ʐ ʑ ɀ

3. ASCII symbols: all ASCII half-width symbols：`-=[]\;',./~!@#$%^&*()_+{}|:"<>?‘"【〖©★, go to "Symbols".

4. Arabic numerals: all full-width Arabic numerals 0-9 and half-width Arabic numerals 0-9, go to "Numbers".

5. Non-Chinese characters, non-Latin names, non-ASCII symbols, non-Arabic numerals: return to "other" (eg, hiragana, katakana, Thai, Hebrew).