Hello everybody, i noticed that the count method of iterables and my manual method of counting subsequences does not work in the way like the homework desires. So i was in doubt of how subsequences are intended. For example we want to count '00' in '000010'. Is the frequency of the segment 2 or 3? When a character is taken it is like "burnt" or the only thing that matters is the position of the segment? Sorry if I was not clear and thanks everyone for the attention.