Core library: is ⋅ be ⋅ it ⋅ by ⋅ to ⋅ at ⋅ on ⋅ not ⋅ this ⋅ that ⋅ dim ⋅ wrap ⋅ unwrap ⋅ rewrap ⋅ intro ⋅ enter ⋅ objective ⋅ get ⋅ put ⋅ shift ⋅ pop ⋅ push Other packages: input ⋅ output