The sequence of natural numbers from
![](https://st.testna5.ru/images/159/1594870a1246dbcc9ece6b354036bd75.png)
to
![](https://st.testna5.ru/images/bb7/bb7ac4ed07980ec573fe3bb57ba5d645.png)
is represented without any spaces between them. The decimal sequence obtained is sorted descending the one-digit numbers corresponding to the decimals. For example for
![](https://st.testna5.ru/images/f29/f2938c6425e239344e9f6bca6c566c49.png)
and
![](https://st.testna5.ru/images/59d/59ddb972591d589f1a5c55bca614387e.png)
the ordered sequence will have the following representation:
98765211110. For
![](https://st.testna5.ru/images/a35/a3541072e2624badb5d442bf43568e89.png)
and
![](https://st.testna5.ru/images/84c/84cf706b874fc273dbaad30500073e0a.png)
the sequence will contain as many “7” digits as____, the first of which is in position with ordinal number _____.
Give your answer in two numbers separated by a comma. For example for
![](https://st.testna5.ru/images/4af/4af676db461216cee7b034d4878aea96.png)
and
![](https://st.testna5.ru/images/82d/82d28ee7f3800908447cfb43bc09d497.png)
in the sequence there will be 19 digits of 7 beginning from position number 39. Thus the result is written as 19,39