e="button" value="b" onclick="charu(''b'');">
<input type="button" value="d" onclick="charu(''d'');">
<input type="button" value="f" onclick="charu(''f'');">
<input type="button" value="n" onclick="charu(''n'');">
<input type="button" value="{" onclick="charu(''{'');">
<input type="button" value="," onclick="charu('','');">
<input type="button" value="}" onclick="charu(''}'');">
<input type="button" value="$" onclick="charu(''