しゅだん
means, way
The hand you use and the step you take to get there, and he was not fussy about either of them. A shoe しゅ and Dan だん holding the door: whatever it took: しゅだん.
方法 ほうほう is a method, the way a thing is done. 手段 is the means used to reach an end, often with a hint of the end justifying them.
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