# Problem of the Week Problem A The Keys to Hidden Messages

There are many ways to encode messages. Here is an encoding using just zeros and ones.

0 0 0 1 1 0 0 1 0 1 1 0 1 1 1 0

This single sequence could represent many different messages. To decode the information correctly, you need a key. The actual message that the encoding represents depends on the key you use to decode it.

Here are two keys which could be used to decode the message:

Alpha Key
Letter Code
C 1 0 0
D 1 0 1 0
E 0 1
O 1 1 1
R 1 0 1 1
S 0 0
T 1 1 0
Beta Key
Letter Code
C 0 0 0 1
D 0 1 1 0
E 1 1 1 0
O 1 0 0 1
R 1 0 1 0
S 0 1 0 1
T 1 0 1 1
1. What is the message if you decode it using the Alpha Key?

2. What is the message if you decode it using the Beta Key?

Theme: Computational Thinking