Locked String

You are given Two string $S$ and $T$. You have to make string equals. You can swap two character in string $S$, but there is some locked index in string $S$. You cannot use locked index in you swap. Can you make two string equal. ###Input: - First line of input is number of testcases $t$ $(1 \le t \le 10)$. - First line of each testcase contain two integer $n$ and $m$ length of stri