Based on the pseudocode below, identify the correct flowchart illustrating the logic specified.

# $1.$ Take an input from the user.

# $2.$ Store it in a variable called $\text{'}$n$\text{'}.$

# $3.$ Validate $\text{'}n\text{'}$

# If $\text{'}n\text{'}$ is not a number:

# Print "Unexpected value format!".

# Exit the program.

# Else:

# Initialize a variable called 'octal' to an empty string.

# While $n>0$ :

# octal $=$ octal $+str(n\%8)$

#$n=\frac{n}{\frac{?}{?}}8$

# Print octal

# Exit the program.