Add spaces between the words in the following text: Whatseemedtobeimpossibleturnedouttobepossible,andthisbecamethestartofhislongseriesofpaperworkschallenginghimselfaswellastheviewerintheshapeofcastlesandnumerousothermotifs.
What seemed to be impossible turned out to be possible, and this became the start of his long series of paper works challenging himself as well as the viewer in the shape of castles and numerous other motifs.