event_id   event_type     time      receiver_id   sender_id    priority		message
1 	    R  	    157  	    20  	
2 	    S  	    218  	    10  	    10  	      3  	    Midterm is coming soon
3 	    R  	    967  	    10  	
4 	    S  	    281  	    10  	    10  	      1  	    CSE373 is interesting
5 	    R  	    452  	    20  	
6 	    S  	    185  	    20  	    20  	      1  	    Always enjoying programming!
7 	    S  	    886  	    20  	    10  	      1  	    CSE373 is interesting
8 	    S  	    871  	    20  	    20  	      1  	    CSE373 is interesting
9 	    S  	    216  	    10  	    20  	      1  	    We like CSE373
10 	    S  	    814  	    10  	    20  	      1  	    We are great programmers
11 	    S  	    858  	    10  	    20  	      2  	    We like CSE373
12 	    R  	    893  	    10  	
13 	    S  	    592  	    10  	    20  	      1  	    I am using Java
14 	    R  	    678  	    20  	
15 	    S  	    466  	    20  	    10  	      1  	    We are great programmers
16 	    S  	    377  	    10  	    20  	      1  	    I am using Java
17 	    S  	    376  	    20  	    20  	      3  	    I spend little time on projects
18 	    S  	    199  	    10  	    20  	      2  	    We are great programmers
19 	    R  	    942  	    10  	
20 	    S  	    612  	    20  	    10  	      1  	    I spend little time on projects