1\t300\t1_a\t30\t1_b\t20
1\t300\t2_a\t22\t2_b\t12
1\t320\t1_a\t10\t1_b\t30
1\t320\t2_a\t32\t2_b\t22
2\t312\t1_a\t30\t1_b\t20
2\t312\t2_a\t22\t2_b\t12
2\t310\t1_a\t31\t1_b\t20
2\t310\t2_a\t21\t2_b\t12