Create a function that finds the reverse complement of a ribonucleic acid (RNA) strand. The RNA will be represented as a string containing only the characters "A", "C", "G" and "U". Since RNA can only (canonically) allow pairings of A/U and G/C, the complement of an RNA would be as follows:
| Original | Complement |
|---|---|
| "AAA" | "UUU" |
| "UUU" | "AAA" |
| "GGG" | "CCC" |
| "CCC" | "GGG" |
Your function should find the complement on the right AND also reverse the resulting string.
reverseComplement("GUGU") ➞ "ACAC"
reverseComplement("UCUCG") ➞ "CGAGA"
reverseComplement("CAGGU") ➞ "ACCUG"
You can assume all input seqeuences will be valid.