Chain Of Thought - What is an example of a chain of thoughts?

Allow me to present a single example to demonstrate a series of thoughts: For example, let's say you have the following collection of numbers: 4, 8, 9, 15, 12, 2, 1. You need to add up all the odd numbers in this set. Finding and adding the odd numbers yields the value 25. These numbers are 9, 15, 1, and 2.