How do I parse an input file in two parts?

I need to parse an input file such as this in two parts..this is just an example file the file can vary but is very similar

Short simulation
5
2
S
45
35
1 30
5 35
3 45
1 60
1 90
END

I want to parse this first and take in these values
Short simulation
5
2
S
45
35

and the second half i want to parse separately
1 30
5 35
3 45
1 60
1 90
END

What did you try? Break the problem down, and describe which part exactly are you having trouble with as there can be a great number of things (reading, writing, parsing?)

reading the file...i can read the entire file but i don't know how to parse it in two parts

To make it clearer I want to take in the first half of the file input separately from the second half and take in the second half of the file input separately

You want to discuss it theoretically or you want to implement it or YOU WANT US TO IMPLEMENT?