[figure: C_{i−1,j−1}; A_{ij}; C_{ij}; B_{ij}; Q_{j−1}.P_{i−1}^{I}?chg; Q_{j}.Q_{j−1}^{O}!ini; Q_{j}.Q_{j−1}^{I}?ini; P_{i}.Q_{j}^{O}!chg; P_{i}.Q_{j}^{I}?chg; P_{i−1}.Q_{j−1}^{I}?chg; P_{i}.P_{i−1}^{O}!ini; P_{i}.P_{i−1}^{I}?ini; Q_{j}.P_{i}^{O}!chg; Q_{j}.P_{i}^{I}?chg]

1

[figure: A_{i−1,j}; A_{ij}; C_{ij}; B_{ij}; P_{i}.Q_{j}^{O}!chg; P_{i}.Q_{j}^{I}?chg; P_{i−1}.Q_{j}^{O}!quo; P_{i−1}.Q_{j}^{I}?quo; P_{i}.P_{i−1}^{O}!ini; P_{i}.P_{i−1}^{I}?ini; Q_{j}.P_{i}^{O}!chg; Q_{j}.P_{i}^{I}?chg]

2

[figure: B_{i,j−1}; A_{ij}; C_{ij}; B_{ij}; Q_{j−1}.P_{i}^{O}!quo; Q_{j−1}.P_{i}^{I}?quo; Q_{j}.Q_{j−1}^{O}!ini; Q_{j}.Q_{j−1}^{I}?ini; P_{i}.Q_{j}^{O}!chg; P_{i}.Q_{j}^{I}?chg; Q_{j}.P_{i}^{O}!chg; Q_{j}.P_{i}^{I}?chg]

3