anchor.diff:  /24 /25 /26 /27 /28 /29 /30  0
   ```
   
  -
   For each subnet you simply add the number of bits (or in this case hosts) from the right, then you add one host bit because you need to account for the host bit with the `/xx` in front of it (ie. `195.151.34.50/24`; you need to include the `.50`). Then minus 2 because you can't use the first and last host in a subnet.
   
  -
  -So if I have a `/27` we add:
  -```
  -/27 = 1 + 2 + 4 + 8 + 16 = 31 + 1 = 32 - 2 = 30
  +So if I have a `/27` we add (using the cheat-sheet above):
  +```
  +/27 = 1 + 2 + 4 + 8 + 16 = 31 + 1 = 32 - 2 = 30 usable hosts
         \________________/   \___/    \____/
                  |             |         |
                  |             |         +- -2 because first+last are not usable
  
positive.code: 
  Or how about `/29`:
  ```
  /29 = 1 + 2 + 4 = 7 + 1 = 8 - 2 = 6
        \_______/   \___/   \___/
            |         |       |
            |         |       +------------ -2 because first+last are not usable
  
negative.code: Lab 4: 18 computers
  ```
  
  First we need to find a subnet that can support 30 hosts, the largest computer lab. `/27` can do that because `/27` has 32 hosts and 30 usable hosts. Remember we need usable hosts! If we need 32 host a `/27` would not work because it only has 30 usable IPs. So our first subnet is `195.151.34.0/27` with a range of:
  ```
  195.151.34.0 - 195.151.34.31
  ```
  
  When then add 32 to 0 and start are new range of `/27`, `195.151.34.32/27`:
  ```
  195.151.34.32 - 195.151.34.63
  ```
  
  Then add 32 to 32 and start are new range of `/27`, `195.151.34.64/27`:
  ```
  195.151.34.64 - 195.151.34.95
  ```
  
  Then add 32 to 64 and start are new range of `/27`, `195.151.34.96/27`:
  ```
  195.151.34.96 - 195.151.34.127
  ```
  
  So to recap our labs look like this:
  ```
  Lab 1: 195.151.34.0/27
  Lab 2: 195.151.34.32/27
  