HTML Table - Border around specific group of cells in a table

I have a border-less table with 12 columns and 5 rows.

I need the block of cells mentioned below to be surrounded  by border (NOT THE INDIVIDUAL CELL). See attachment for illustration)
cell 1, 2, 6, 7, 11, 12
cell 21,22
cell 41, 42
cell 51, 52,56, 57
cell 4, 5, 9,10, 14,15, 19, 20, 24, 25
cell 54, 55, 59, 60

Any help is greatly appreciated

<table>
      <tbody>
            <tr>
                  <td>1</td>
                  <td>2</td>
                  <td>3</td>
                  <td>4</td>
                  <td>5</td>
            </tr>
            <tr>
                  <td>6</td>
                  <td>7</td>
                  <td>8</td>
                  <td>9</td>
                  <td>10</td>
            </tr>
            <tr>
                  <td>11</td>
                  <td>12</td>
                  <td>13</td>
                  <td>14</td>
                  <td>15</td>
            </tr>
            <tr>
                  <td>16</td>
                  <td>17</td>
                  <td>18</td>
                  <td>19</td>
                  <td>20</td>
            </tr>
            <tr>
                  <td>21</td>
                  <td>22</td>
                  <td>23</td>
                  <td>24</td>
                  <td>25</td>
            </tr>
            <tr>
                  <td>26</td>
                  <td>27</td>
                  <td>28</td>
                  <td>29</td>
                  <td>30</td>
            </tr>
            <tr>
                  <td>31</td>
                  <td>32</td>
                  <td>33</td>
                  <td>34</td>
                  <td>35</td>
            </tr>
            <tr>
                  <td>36</td>
                  <td>37</td>
                  <td>38</td>
                  <td>39</td>
                  <td>40</td>
            </tr>
            <tr>
                  <td>40</td>
                  <td>42</td>
                  <td>43</td>
                  <td>44</td>
                  <td>45</td>
            </tr>
            <tr>
                  <td>46</td>
                  <td>47</td>
                  <td>48</td>
                  <td>49</td>
                  <td>50</td>
            </tr>
            <tr>
                  <td>51</td>
                  <td>52</td>
                  <td>53</td>
                  <td>54</td>
                  <td>55</td>
            </tr>
            <tr>
                  <td>56</td>
                  <td>57</td>
                  <td>58</td>
                  <td>59</td>
                  <td>60</td>
            </tr>
      </tbody>
</table>
Capture.PNG