## Question 1
What’s the correct output for the following inputs?

`src` = "hit"

`dest` = "cog"

`words` = ["log", "dot", "lot", "dog", "hot", "cog"]

### Options

1. 5
Correct
hit $\to$ hot $\to$ dot $\to$ dog $\to$ cog
----------------------------

2. 6
Incorrect

----------------------------

3. 0
Incorrect

----------------------------

4. 7
Incorrect

----------------------------

---------------------------------------------

## Question 2
What’s the correct output for the following inputs?

`src` = "hit"

`dest` = "cog"

`words` = ["hot", "dot", "dog", "lot", "log", "com"]

### Options

1. 5
Incorrect

----------------------------

2. 0
Correct
No transformation sequence exists.
----------------------------

3. 6
Incorrect

----------------------------

4. 7
Incorrect

----------------------------

---------------------------------------------

## Question 3
What’s the correct output for the following inputs?

`src` = "head"

`dest` = "tail"

`words` = ["tell", "tail", "heal", "teal", "tall"]

### Options

1. 0
Incorrect

----------------------------

2. 5
Incorrect

----------------------------

3. 6
Correct
head $\to$ heal $\to$ teal $\to$ tell $\to$ tall $\to$ tail
----------------------------

4. 7
Incorrect

----------------------------

---------------------------------------------