Question 743691
a personal password is to consist of a letter, followed by two digits, followed 
by 2 letters.  Determine the number of codes possible if the first digit cannot 
be zero and repetition is permitted.
.
first: 26 letters
second: 9 digits (excludes zero)
third: 10 digits (includes zero)
fourth: 26 letters
fifth: 26 letters
.
number of codes:
26*9*10*26*26 = 1581840