$(12$ pts$)$ Write a code fragment with nested for loops that will print

out $121,12321,$dots,$1234567654321$ all on separate lines. $($Note:

the $...$ means to continue the pattern up to $1234567654321.)$ Do not

declare any variables other than the loop counters in the for loops.

$($You should print one digit at a time. You will want an outer for$-$

loop to step through each number, and two inner loops $-$ one to count

$"$up$"$ for the current number, and one to count "down".$)$