There are 10 hosts numbered from 0 to 9, and 10 tasks numbered from 0 to 9. Each host has a set of tasks that it is interested in: 
Host 2 is interested in task 0.
Host 5 is interested in task 6.
Host 0 is interested in task 2.
Host 2 is interested in task 4.
Host 4 is interested in task 8.
Host 9 is interested in task 4.
Host 2 is interested in task 6.
Host 0 is interested in task 6.
Host 2 is interested in task 5.
Host 6 is interested in task 3.
Host 6 is interested in task 1.
Host 2 is interested in task 9.
Host 9 is interested in task 7.
Host 4 is interested in task 4.
Host 5 is interested in task 9.
Host 1 is interested in task 1.
Host 1 is interested in task 9.
Host 4 is interested in task 7.
Host 1 is interested in task 3.
Host 4 is interested in task 1.
Host 3 is interested in task 0.
Host 9 is interested in task 2.
Host 0 is interested in task 5.
Host 7 is interested in task 2.
Host 8 is interested in task 9.
Host 3 is interested in task 4.
Host 4 is interested in task 3.
Host 4 is interested in task 6.
Host 1 is interested in task 6.
Host 0 is interested in task 0.
Host 9 is interested in task 9.
Host 6 is interested in task 0.
Host 3 is interested in task 2.
Host 0 is interested in task 4.
Host 2 is interested in task 2.
Host 5 is interested in task 5.
Host 5 is interested in task 0.
Host 1 is interested in task 4.
Host 6 is interested in task 2.
Host 0 is interested in task 8.
Host 2 is interested in task 1.
Host 3 is interested in task 8.
Host 5 is interested in task 1.
Host 1 is interested in task 0..