Two-out-of-five code

Two-out-of-five code is a way to make sure that the right person gets something. Imagine you have a bunch of boxes with different toys inside. Each box has its own code, and in order to open the box you need to enter the right code. With two-out-of-five code, you would need to enter two out of five numbers in the right order in order to open the box and get the toy. For example, if the code for the box is 12456, you might need to enter 12, 25, 34, 45, or 56 in order to open the box.