# This is used to test that the row iterators are working, by seeing
# if they can be used to count the number of entries in each row.
# Row 0 has 2 entries
0 0 1
0 2 1
# Row 1 has no entries
# Row 2 has 2 entries, but specified in pieces
2 1 3
2 2 2
2 1 5
2 2 7
# Row 3 has no entries
# Row 4 has 4 entries
4 0 0
4 1 1
4 2 2
4 3 3

