In other words: A Permutation is an ordered Combination. There are basically two types of permutation: 1  Repetition is Allowed: such as the lock above. It could be 333.  No Repetition: for example the first three people in a running race. You can't be first and second.
For this reason, the idea that collagen supplementation can be an effective treatment for joint pain, osteoarthritis, or any other condition, is highly implausible, if not impossible in principle.
On top of dehydration and a lack of stretching, this is due to a lack of collagen which results in joint pain, inflammation and deterioration. With good collagen supplementation, you may notice more agility in your joints, tendons, and ligaments, and less arthritic-like symptoms.