rnfail033.hs:2:21: error: Not in scope: ‘Data.List.map’ Perhaps you meant one of these: ‘Data.List.zip’ (imported from Data.List), ‘Data.List.all’ (imported from Data.List), ‘Data.List.and’ (imported from Data.List) Perhaps you want to remove ‘map’ from the explicit hiding list in the import of ‘Data.List’ (rnfail033.hs:3:1-31).