Write a function to print out the seating chart for a plane. The function takes a number of rows and a number of seats (e.g. 17 rows, 5 seats per row) and prints out the seating chart like this:
1A 1B 1C 1D 1E 2A 2B 2C 2D 2E 3A 3B 3C 3D 3E ... 17A 17B 17C 17D 17E
Remember that characters are just numbers that are decoded using ASCII. (Here is the ASCII Table to remind you how that works.)