Output all combinations of character variables $a,b,$ and $c,$ in the order shown below. After the final output, end with a newline. If a $=\text{'}x\text{'},b=y^{\text{'}}\text{'},$ and $c=\text{'}z\text{'},$ then the output is:

$xyzxzyyxzyzxzxyzyx$

Note: Our autograder automatically runs your program several times, trying different input values each time to ensure your program works for any values. This program is tested three times, first with the inputs $xyz,$ then with the inputs # $$\%,$ and finally with the inputs $123.$