Paste from MS Word to Tinymce online editor

When we  copy the text from Microsoft Word to Tinymce online  editor, sometimes  extra characters are added on.  This is due to that  "paste" plugin in Tinymce not initialized.
You can also  add buttons: "paste as plain text" and "paste from word" in the Tinymce. But  you  do not have to add these buttons: "paste as plain text" and "paste from word" due to that   adding "paste" plugin already fixes the bug.

 Example: add "paste" plugin,   "paste as plain text" and "paste from word" buttons in Tinymce initialization:
<script type="text/javascript">

        tinymce.init({
             mode : "textareas",
           editor_selector : "mce-editor",
            elements: "table,advhr,advimage,advlink,preview,print,contextmenu,paste",
            theme: "advanced",
            plugins: 'paste',
            theme_advanced_buttons1: "fontselect, fontsizeselect,pastetext,pasteword",
            theme_advanced_buttons2: "",
            theme_advanced_buttons3: "",
            theme_advanced_buttons4: "",
            theme_advanced_toolbar_location: "top",
            theme_advanced_toolbar_align: "left",
            extended_valid_elements: "p,span[*],delete[*],insert[*]",
            height: '400'
        });
</script>