ul
list=[1, 2, 3, 4, 5]; begin=3
list=[1, 2, 3, 4, 5]; begin=1; end=3
list=[1, 2, 3, 4, 5]; begin=1; end=4; step=2
list=[1, 2, 3, 4, 5]; begin=5;
list=[1, 2, 3, 4, 5]; end=0;