Sorting the meristems

A list gives six places in a plant where cells divide. Each one has a kind of meristem and says what it adds. You will sort the list, count it, and write a small function for the regrowth of grass.

The idea. Each row has a site, a meristem and what it adds: length or girth.

Your tasks.

1. Set lengthening to the sites that add length, in the order of the list.
2. Set girth_count to the number of meristems that add girth.
3. Finish height. It gives the height of a grass blade days days after it is cut to cut cm, when it grows rate cm a day.