String Encoding Encode a given string by collapsing consecutive instances of a single character into two pieces of information: the number of instances and the character. Note that even single characters should be run-length encoded. If the string is empty, return an empty string. Your implementation should work on all alphanumeric characters. Function Description Complete the function collapselnput which takes a string input as a parameter and returns the compressed string. Sample Input: GGGGGrrrrrrrrrrrrttt Sample Output: 5G14r3t Explanation: There are 5 'G' characters, then there are 14 'r's, then there is 1 't'.