Starting with variables s and t:

s $=$ 'Better late than never'

t $=$ 'but better never late'

add a comma and a space to the end of s$,$ assigning the result back to s$.$

Next, concatenate s and t$,$ assigning the resulting value to the variable u

Print the result

print$($u$)$

Now change u to uppercase, and add an exclamation point, assigning the result to v

Print the result

print$($v$)$

The output of your program should be as follows:

Better late than never, but better never late

BETTER LATE THAN NEVER, BUT BETTER NEVER LATE!