row col ← ⎕D(⍎¨∊⍨⊆⊢)⊃⊃⎕NGET'in/25.txt'1
n ← {(⊢/⍵-1)+2!(+/⍵)-1} row col

⎕← {33554393|252533×⍵}⍣n⊢20151125