diff --git a/src/punctuation/sentence.py b/src/punctuation/sentence.py
new file mode 100755
index 0000000..976b5e2
--- /dev/null
+++ b/src/punctuation/sentence.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import json
+
+punctuations = [
+    ' ', '-', '.', '~', '·', '—',
+    '‘', '’', '“', '”', '…',
+    '、', '。', '《', '》', '！', '（', '）',
+    '，', '：', '；', '？',
+]
+
+defaultPath = os.path.join(
+    os.path.dirname(os.path.realpath(__file__)), '../../release/'
+)
+
+
+def loadContent(filename: str) -> list:  # load json content
+    if not filename.endswith('.json'):
+        filename += '.json'  # add file suffix
+    raw = json.loads(open(
+        os.path.join(defaultPath, filename)
+    ).read())
+    combine = []
+    for (title, content) in raw.items():
+        combine.append(title)
+        combine += content
+    return combine
+
+
+def abstract(raw: str) -> str:  # keep only punctuation in sentence
+    sentence = list(raw)
+    for i in range(0, len(sentence)):
+        if sentence[i] not in punctuations:
+            sentence[i] = ''
+    result = [sentence[0]]
+    for c in sentence[1:]:
+        if c == '' and result[-1] == '':
+            continue
+        result.append(c)
+    return ''.join(['➕' if x == '' else x for x in result])
+
+
+def sentenceType(content: list) -> list:
+    result = set()
+    for row in content:
+        result.add(abstract(row))
+    return list(sorted(result))
+
+
+print('\n'.join(
+    sentenceType(loadContent('rc-5'))
+))