seq1	seq1	0
seq1	seq2	1
seq1	seq3	2
seq1	seq4	3
seq2	seq1	1
seq2	seq2	0
seq2	seq3	3
seq2	seq4	4
seq3	seq1	2
seq3	seq2	3
seq3	seq3	0
seq3	seq4	4
seq4	seq1	3
seq4	seq2	4
seq4	seq3	4
seq4	seq4	0