How many numbers are in the list 
    1, 4, 7, …, 2005, 2008 ?

Adding 2 to each member of the list, we get 
    3, 6, 9, …, 2007, 2010,
and then dividing each member of the list by 3, we get 
    1,2,3,…,669,670,
so there are 670 numbers.
Complete the following task based on the instruction and optional input provided.### Instruction:
How many numbers are in the list 
    1, 4, 7, …, 2005, 2008 ?


### Output:
Adding 2 to each member of the list, we get 
    3, 6, 9, …, 2007, 2010,
and then dividing each member of the list by 3, we get 
    1,2,3,…,669,670,
so there are 670 numbers.