I am trying to remove the rest of the string after a certain number of forward slashes. 
I want this: 

```
https://yeezysupply.com/17655971/checkouts/4cba9aacf4ad07b281d152fb4b51c8cc/stock_problems

```

To become this: 

```
https://yeezysupply.com/17655971/checkouts/4cba9aacf4ad07b281d152fb4b51c8cc

```

I want to remove the text after the 6th forward slash.