# Task
Get the digits sum of `n`th number from the [Look-and-Say sequence](http://en.wikipedia.org/wiki/Look-and-say_sequence)(1-based).
`1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, ...`
# Input/Output
`[input]` integer `n`
`n`th number in the sequence to get where `1 <= n <= 55`  and `n=1 is "1"`.
[output] an integer
The sum of digits in `n`th number from the `Look-and-Say` sequence.
# Example
For `n = 2`, the output shoule be 2.
`"11" --> 1 + 1 --> 2`
For `n = 3`, the output shoule be 3.
`"21" --> 2 + 1 --> 3`
For `n = 4`, the output shoule be 5.
`"1211" --> 1 + 2 + 1 + 1 --> 5`
look_and_say_and_sum=l=lambda n,s='1':n<2and sum(map(int,s))or l(n-1,''.join(str(len(list(g)))+k for k,g in __import__('itertools').groupby(s)))
look_and_say_and_sum=l=lambda n,s='1':n<2and sum(map(int,s))or l(n-1,''.join(str(len(list(g)))+k for k,g in __import__('itertools').groupby(s)))