Approver Comments:
At first I came to the same conclusion as you (though I would find it difficult to ever consider a nine year old for gymnasium). Then I took another look. There was a young man named Szaja Lajb Berlinski/Berlinska (b. 1929) and another named Szyja Berlinski (b. 1927). Either of these two would be a more likely candidate based on their birthdates... especially Szyja. HOWEVER -- I could still be wrong and your original inclination could be correct on this... Salek and Szmul are both nicknames for Solomon. Salek is Polish and Szmul is a Yiddish. Szaja, on the other hand, is short for Isaiah. So, who knows? Even though, 9 years old seems impossibly young for a gymnasium student, I'll mark your entry as "possible" on the hunch that perhaps the birth date was recorded incorrectly. This will need significantly more research to confirm.