Chef And Strings 2

Having solved the first problem chef's wife has decided to make things tough for him, she tells him the following things about the $Kth$ power of a string The $kth$ power of a string $i$ is denoted as $i^k$ and the string $i^k$ is obtained by concatenating $k$ copies of the string $i$. The string $i^(k+1) = i^k.i$, where $+$ denotes concat