The International Morse code is a way of transmitting coded text by using sequences of on>off tones. Each character is 1 or 2 or 3 or 4 or 5 segments long, and each segment is either a dot or a dash. For example, the letter G is transmitted as two dashes followed by a dot, as in - - • . How many different characters are possible with this scheme? Are there enough characters for the alphabet and numbers?