Acid The police have a difficult case. There is a secret message in a special box. The box can only be opened with a four number code. If the wrong number is pressed, t inside the box will destroy the message. There is a clue: 22, 9, 9 - 9, 24-9, 22 - 9, 9, 9 Sherlock Holmes looks at it and presses 7943. The box opens. The police officers are amazed. How did he work out the number? Can you?

Dear Tom, I’ve just ARRIVED to Rome but I’m still recovering from a REALLY terrible flight. We took off two hours late because of bad weather. They told TO FASTEN our seat belts and it was WORRYING. For half an hour we flew a DANGEROUS storm. It was raining and WINDY when we landed in Rome, but I was glad to get into the airport BUILDING. FORTUNATELY, things have IMPROVED since then and I hope the return flight will be more COMFORTABLE. Rome is THE MOST BEAUTIFUL in the world. I MISS you so much.