User passwords for a certain computer network consist of 22 letters followed by 44 numbers. how many different passwords are possible? repetition is allowed.

There are 26 different possibilities for each of the letters and 10 different possibilities for each of the numbers. Using the fundamental counting principle, there are 26^22 x 10^44 different unique passwords. If letters can be capitalizes, the number of combinations is 52^22 x 10^44.