Simple order list:

1. First line
2. Second line
3. Last line...

Nested order list item (level 2):

1. Level 1 : First line

1. Level 2 : First line
2. Level 2 : Second line

2. Level 1 : Last line...

Nested order list item (level 5):

1. Level 1 : First line

1. Level 2 : First line
2. Level 2 : Second line

1. Level 3 : First line

1. Level 5 : First line
2. Level 5 : Second line

1. Level 4 : First line
2. Level 4 : Second line

2. Level 3 : Second line

2. Level 1 : Last line...