1                1             -7.5
                2                1              1.5
                3                1              7.5
                1                2             11.5
                2                2             19.5
                3                2             32.5
                1                3              9.5
                2                3              1.5
                3                3               15
                1                4              4.5
                2                4                2
                3                4               16
                1                5              3.5
                2                5                5
                3                5               11