# name: pref
# type: matrix
# rows: 8
# columns: 8
1 1 1 1 1 2 2 2
1 1 2 2 2 2 3 3
1 2 2 2 3 3 3 4
2 3 3 3 3 4 4 4
3 3 3 4 4 4 4 5
4 4 4 4 4 5 5 5
1 2 2 2 5 5 5 5
1 1 1 2 2 2 5 5