Add spaces between the words in the following text: However,itiscertainlyfairtosaythatby1939Tarskihadanoutstandinginternationalreputationbutwasstillforcedtosupporthimselfbyteachingmathematicsinahighschool.
However, it is certainly fair to say that by 1939 Tarski had an outstanding international reputation but was still forced to support himself by teaching mathematics in a high school.