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把1、2、3、4、5、6填入表格内,要使得每一行右边的数字比左边的数字大,每一列下面的数字比上面的数字大,有几种填法?
1, 2, 3, 4, 5, 6 fill in the form, so that the number to the right of each row is greater than the number to the left, and the numbers below each column are larger than the numbers above.