A15233 | Grass Field

There is a field of size $2 \times 2$ . Each cell of this field can either contain grass or be empty. The value $a_{i, j}$ is $1$ if the cell $(i, j)$ contains grass, or $0$ otherwise.

In one move, you can choose one row and one column and cut all the grass in this row and this column. In other words, you choose the row $x$ and the column $y$ , then you cut the grass in all cells $a_{x, i}$ and all cells $a_{i, y}$ for all $i$ from $1$ to $2$ . After you cut the grass from a cell, it becomes empty (i. e. its value is replaced by $0$ ).

Your task is to find the minimum number of moves required to cut the grass in all non-empty cells of the field (i. e. make all $a_{i, j}$ zeros).

You have to answer $t$ independent test cases.

The first line of the input contains one integer $t$ ( $1 \le t \le 16$ ) — the number of test cases. Then $t$ test cases follow.

The test case consists of two lines, each of these lines contains two integers. The $j$ -th integer in the $i$ -th row is $a_{i, j}$ . If $a_{i, j} = 0$ then the cell $(i, j)$ is empty, and if $a_{i, j} = 1$ the cell $(i, j)$ contains grass.

For each test case, print one integer — the minimum number of moves required to cut the grass in all non-empty cells of the field (i. e. make all $a_{i, j}$ zeros) in the corresponding test case.