Answer 1

Slicing :
[ startIndex, endIndex, stepCount]

starting index is where it starting slicing.
endIndex is not inclusive. endIndex-1 is the last index to slice. (optional)
Step count is the number of steps to skip to next slice. (optional, default is 1)

x="GREEN VEGGIES"
print(x[1: :-1])

Start at index 1, till all, by -1 steps. (Negative count means backwards)
get 1st index value, 1-1=0 index value, 0-1 is out of range stop
Output : RG