Answer:
1. Bob and Alice are using a secret cipher key generated from the first row of a Sudoku puzzle. Can you find the secret cipher key from this: 1 0 0 0 8 4 0 3 0 0 0 0 5 1 0 0 0 7 0 8 9 0 0 0 0 4 0 0 0 0 0 0 0 2 0 8 0 6 0 2 0 1 0 5 0 0 0 2 0 0 0 0 0 0 0 7 0 0 0 0 5 2 0 9 0 0 0 6 5 0 0 0 0 4 0 3 7 0 0 0 0
1 0 0 0 8 4 0 3 0 0 0 0 5 1 0 0 0 7 0 8 9 0 0 0 0 4 0 0 0 0 0 0 0 2 0 8 0 6 0 2 0 1 0 5 0 0 0 2 0 0 0 0 0 0 0 7 0 0 0 0 5 2 0 9 0 0 0 6 5 0 0 0 0 4 0 3 7 0 0 0 0
Ans: 1 5 6 7 8 4 9 3 2