Now I watched a picture at the railway station: the carpenter was trying to drive the water from 3 holes into the well.
The holes were located 1-->2-->3-->Luke
So he first moved the water from hole No. 3 into the hole.
Then from the 2nd to the 3rd, and then into the luck.
And then came the 1st...
This whole process reminded me of the work of our IT department.