# Initialize sets A and B

A $=\{\text{'}$a$\text{'},\text{'}$b$\text{'},\text{'}$c$\text{'},\text{'}$d$\text{'},\text{'}$e$\text{'},\text{'}$f$\text{'}\}$

B $=\{\text{'}$c$\text{'},\text{'}$d$\text{'},\text{'}$f$\text{'},\text{'}$h$\text{'},\text{'}$j$\text{'},\text{'}$k$\text{'}\}$

print$(\text{'}$A $=\text{'},$ sorted$($A$))$

print$(\text{'}$B $=\text{'},$sorted$($B$))$

print$(\text{'}\text{'})$

#Block $1$: computes and prints out the set A $-$ B

AminusB $=$ set$()$

for element in A: # this line runs through every element in A

if not$($element in B$)$: #A $-$ B is the set of elements that are in A and are not in B

AminusB.add$($element$)$ # Add it AminusB every element in A if the element is also not in B

print$(\text{'}$A $-$ B $=\text{'},$ sorted$($AminusB$))$

print$(\text{'}\text{'})$