Shtan is the “sh” sound
There is no rune poem for shtan. It is a Northumbrian rune.
Shtan, stone, signifies foundation, permanence, and the eternal. Like stone that can withstand centuries, while the lives of men and other living things rise and fall and change about it. Today, particularly it is a foundation to lean on. It’s particular effect is one of boon or fortune, lending support when so much is happening, or perhaps has fallen away from you.