time     receiver_id     sender_id    priority     	message
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223 	 20 	 10 	 2 	 CSE373 is interesting 	 
351 	 10 	 20 	 3 	 I spend little time on projects 	 
107 	 10 	 10 	 2 	 Always enjoying programming! 	 
275 	 10 	 10 	 2 	 We are great programmers 	 
543 	 20 	 20 	 2 	 I am using Java 	 
854 	 10 	 20 	 2 	 I spend little time on projects