try this idea
<b>Excel 2007</b><table cellpadding="2.5px" rules="all" style=";background-color: #FFFFFF;border: 1px solid;border-collapse: collapse; border-color: #A6AAB6"><colgroup><col width="25px" style="background-color: #E0E0F0" /><col /><col /></colgroup><thead><tr style=" background-color: #E0E0F0;text-align: center;color: #161120"><th></th><th>A</th><th>B</th></tr></thead><tbody><tr ><td style="color: #161120;text-align: center;">1</td><td style=";">Mo Tu We Th Fr Sa Su</td><td style="text-align: right;;">7</td></tr><tr ><td style="color: #161120;text-align: center;">2</td><td style=";">Mo We Fr Su</td><td style="text-align: right;;">4</td></tr><tr ><td style="color: #161120;text-align: center;">3</td><td style=";">Tu Th Sa</td><td style="text-align: right;;">3</td></tr><tr ><td style="color: #161120;text-align: center;">4</td><td style=";">Mo Th Su</td><td style="text-align: right;;">3</td></tr></tbody></table><p style="width:3.6em;font-weight:bold;margin:0;padding:0.2em 0.6em 0.2em 0.5em;border: 1px solid #A6AAB6;border-top:none;text-align: center;background-color: #E0E0F0;color: #161120">Sheet4</p><br /><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: #FFFFFF" ><tr><td style="padding:6px" ><b>Array Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: #FFFFFF;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style=" background-color: #E0E0F0;color: #161120"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">B1</th><td style="text-align:left">{=SUM(<font color="Blue">IF(<font color="Red">MID(<font color="Green">A1,ROW(<font color="Purple">INDIRECT(<font color="Teal">"1:"&LEN(<font color="#FF00FF">A1</font>)</font>)</font>),1</font>)<>" ",1</font>)</font>)/2}</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">B2</th><td style="text-align:left">{=SUM(<font color="Blue">IF(<font color="Red">MID(<font color="Green">A2,ROW(<font color="Purple">INDIRECT(<font color="Teal">"1:"&LEN(<font color="#FF00FF">A2</font>)</font>)</font>),1</font>)<>" ",1</font>)</font>)/2}</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">B3</th><td style="text-align:left">{=SUM(<font color="Blue">IF(<font color="Red">MID(<font color="Green">A3,ROW(<font color="Purple">INDIRECT(<font color="Teal">"1:"&LEN(<font color="#FF00FF">A3</font>)</font>)</font>),1</font>)<>" ",1</font>)</font>)/2}</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">B4</th><td style="text-align:left">{=SUM(<font color="Blue">IF(<font color="Red">MID(<font color="Green">A4,ROW(<font color="Purple">INDIRECT(<font color="Teal">"1:"&LEN(<font color="#FF00FF">A4</font>)</font>)</font>),1</font>)<>" ",1</font>)</font>)/2}</td></tr></tbody></table><b>Entered with Ctrl+Shift+Enter.</b> If entered correctly, Excel will surround with curly braces {}.
<b>Note: Do not try and enter the {} manually yourself</b></td></tr></table><br />