编写一个程序，该程序接受两个字符串作为输入，并将它们连接起来，然后在末尾添加"how are you?"


字符串1: "Hello"
字符串2: "world"
以下是Python的代码实现：

```python
string1 = "Hello"
string2 = "world"
result = string1 + string2 + "how are you?
"
print(result)
```

输出结果为：
```
Helloworldhow are you?
```