title: How to add multiple slashes to a single cell
body: <p>I have a column with about 5k rows that I need to add slashes to. I need to add slashes to the first, second, and last space (" ") in the cell. Each cell has different lengths so there are different amounts of spaces between the second and last in each row.
  Here's an example of some rows</p>
  
  <pre><code>NYLA D DURA FEMUR BCN LG
  NULO D FZD GF BF 5oz
  OMNI D BRTSH SLP LD GRN 4ft
  OMNI D LIGHT S-HOOK
  OMNI D SS BOWL 3qt
  </code></pre>
  
  <p>I need these converted to</p>
  
  <pre><code>NYLA/D/DURA FEMUR BCN/LG
  NULO/D/FZD GF BF/5oz
  OMNI/D/BRTSH SLP LD GRN/4ft
  OMNI/D/LIGHT S-HOOK
  OMNI/D/SS BOWL/3qt
  </code></pre>
  
  <p>I have tried using the substitute formula but that will only add one slash when I need to add 1-3. I'm not sure if nesting the substitute formula is possible in this scenario. If so, that should do it but I can't get it to work.</p>