Given a string, return its encoding defined as follows:
First, the string is divided into the least possible number of disjoint **substrings** consisting of identical characters
for example, `"aabbbc"` is divided into `["aa", "bbb", "c"]`
Next, each substring with length greater than one is replaced with a concatenation of its length and the repeating character
for example, substring `"bbb"` is replaced by `"3b"`
Finally, all the new strings are concatenated together in the same order and a new string is returned.
####SUBSTRING
A **substring** of a string `S` is another string `S'` that occurs in `S`. For example, `"Fights"` is a substring of `"CodeFights"`, but `"CoFi"` isn't.
**Example**
For `s = "aabbbc"`, the output should be `lineEncoding(s) = "2a3bc"`.
**Input/Output**
* [time limit] 4000ms (py)
* [input] string s (String consisting of lowercase English letters.)