Question 1
Using this 5×5 cipher matrix:
★ ♠ ♣ ♥ ♦
♣ ♥ ♦ ★ ♠
♦ ★ ♠ ♣ ♥
♠ ♣ ♥ ♦ ★
♥ ♦ ★ ♠ ♣
Letters A-T map to cells in row-major order (A→★, B→♠, C→♣, D→♥, E→♦, etc.)
What is the encoded form of 'SECRET'?
Encoding 'SECRET': S→♦ E→♦ C→♣ R→♥ E→♦ T→★ = ♦♦♣♥♦★