1.1 maekawa 1: M: 2: {3 21 : 3: 5 0 0 4 3 2 1 0 0 0 0 1 2 3 4 3 1 1 2 2 1 4: 0 5 0 1 2 3 4 4 3 2 1 0 0 0 0 1 3 1 2 1 2 5: 0 0 5 0 0 0 0 1 2 3 4 4 3 2 1 1 1 3 1 2 2 6: } 7: