diff --git a/src/extensions/libs/markdownItNotesSheet.js b/src/extensions/libs/markdownItNotesSheet.js
new file mode 100644
index 00000000..694bc4c2
--- /dev/null
+++ b/src/extensions/libs/markdownItNotesSheet.js
@@ -0,0 +1,119 @@
+/* eslint-disable */
+function abcNotation(state, startLine, endLine, silent) {
+  const validateParams = params => params.trim().match(/^abc$/);
+
+  let pos,
+    nextLine,
+    markup,
+    params,
+    token,
+    oldParent,
+    oldLineMax,
+    markerLength,
+    autoClosed = false,
+    start = state.bMarks[startLine] + state.tShift[startLine],
+    max = state.eMarks[startLine];
+
+  // Check out the first character quickly,
+  // this filters out all non-codeblocks
+  const marker = state.src.charCodeAt(start);
+  if (marker !== 0x7e /* ~ */ && marker !== 0x60 /* ` */) {
+    return false;
+  }
+
+  // Check out the rest of the marker string
+  const markerStart = pos;
+  pos = state.skipChars(pos, marker);
+  markerLength = pos - markerStart;
+  if (markerLength < 3) {
+    return false;
+  }
+
+  markup = state.src.slice(start, pos);
+  params = state.src.slice(pos, max);
+  if (!validateParams(params)) {
+    return false;
+  }
+
+  // Since start is found, we can report success here in validation mode
+  if (silent) {
+    return true;
+  }
+
+  // Search for the end of the block
+  nextLine = startLine;
+
+  for (;;) {
+    nextLine += 1;
+    if (nextLine >= endLine) {
+      // unclosed block should be autoclosed by end of document.
+      // also block seems to be autoclosed by end of parent
+      break;
+    }
+
+    start = state.bMarks[nextLine] + state.tShift[nextLine];
+    max = state.eMarks[nextLine];
+
+    if (start < max && state.sCount[nextLine] < state.blkIndent) {
+      // non-empty line with negative indent should stop the list:
+      // - ```
+      //  test
+      break;
+    }
+
+    if (marker !== state.src.charCodeAt(start)) {
+      continue;
+    }
+
+    if (state.sCount[nextLine] - state.blkIndent >= 4) {
+      // closing fence should be indented less than 4 spaces
+      continue;
+    }
+
+    pos = state.skipChars(pos, marker);
+    // closing fence must be at least as long as the opening one
+    if (pos - markerStart < markerLength) {
+      continue;
+    }
+
+    // make sure tail has spaces only
+    pos = state.skipSpaces(pos);
+
+    if (pos < max) {
+      continue;
+    }
+
+    autoClosed = true;
+    // found!
+    break;
+  }
+
+  old_parent = state.parentType;
+  old_line_max = state.lineMax;
+  state.parentType = 'container';
+
+  // If a fence has heading spaces, they should be removed from its inner block
+  // markerLength = state.sCount[startLine];
+
+  // this will prevent lazy continuations from ever going past our end marker
+  state.lineMax = nextLine;
+
+  token = state.push('fence_abc', 'div', 1);
+  token.info = params;
+  // token.content = state.getLines(startLine + 1, nextLine, markerLength, true);
+  token.markup = markup;
+  token.block = true;
+  token.map = [startLine, nextLine];
+
+  state.parentType = old_parent;
+  state.lineMax = old_line_max;
+  state.line = nextLine + (autoClosed ? 1 : 0);
+
+  return true;
+}
+
+export default md => {
+  md.block.ruler.before('fence', 'fence_abc', abcNotation, {
+    alt: ['paragraph', 'reference', 'blockquote', 'list'],
+  });
+};