Problem:
```
1 is connected to 2.
1 is connected to 4.
```
Question:
```
What is the shortest path from 4 to 1?
```
Answer:
```
- 4 to 1
```


Problem:
```
3 is connected to 2.
4 is connected to 3.
```
Question:
```
What is the shortest path from 2 to 4?
```
Answer:
```
- 2 to 3
- 3 to 4
```


Problem:
```
3 is connected to 2.
4 is connected to 3.
5 is connected to 6.
```
Question:
```
What is the shortest path from 2 to 6?
```
Answer:
```
There is no path from 2 to 6
```



Problem:
```
1 is connected to 10.
14 is connected to 10.
12 is connected to 14.
```
Question:
```
What is the shortest path from 1 to 14?
```
Answer:
```