How to open student mailbox

Numerical dial lock

Follow instructions, the trick with this type of lock is on the last turn to the right. On this last turn, turn the dial ONLY until you start to feel tension, and then open the latch. 

Two alpha dial lock

The trick with this type of lock is that the line above the letter is “Zero” and each subsequent line is One, Two, Three.  In the example here, note the red arrows designating where to place the dial for a combination of E   U3 the line above the U counts as zero and then three notches (lines) to the right to get to U3, for example

One alpha dial lock

Follow the instructions, and the trick with this lock is where you have a combination of two letters. See example here, A-B is the part of the dial in between letters A and B.