CHALLENGE ACTIVITY

$1\mathrm{.}11\mathrm{.}2$: Outputting all combinations.

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

xyz xzy yxz yzx zxy zyx

Your code will be tested in three different programs, with a$,$ b$,$ c assigned with $\text{'}$x$\text{'},\text{'}$y$\text{'},\text{'}$z$\text{'},$ then with $\text{'}$#$\text{'},\text{'}$$$\text{'},\text{'}\%\text{'},$ then with $\text{'}1\text{'},\text{'}2\text{'},\text{'}3\text{'}.$ C$++$