def base.os
import bend-parallel@0.1.0.0/sort.bend as Sortimport Base
import bend-parallel@0.1.0.0/histogram.bend as Hist
182def base.os(+c: U32, +last: U32, +step: U32, +nm: Nat, t: Array<U32>, r: Array<U32> & U32) -> Hist.Two:
183 (os, +o) = r
184 Hist.Two{base.at((last + c : U32), step, nm, o, t[(last + c : U32)]), os}