11. (12 points) There are 16 cards, 8 black and 8 white, each labeled with the numbers $1 \sim 8$. After shuffling them like a deck of cards, they are arranged in four rows according to the following rules: in each row, the cards are arranged from left to right in ascending order, and when the numbers on black and white cards are the same, the black card is placed on the left. It is known that the sum of the 4 numbers on the cards in each row is equal, the bottom left corner is 2, and the top right corner is 7. Please answer: the numbers on the four cards from the top left to the bottom right diagonal are $\qquad$
【Answer】Solution: According to the analysis, the figure can be obtained as follows: or
Answer: The numbers on the four cards along the diagonal from the top left to the bottom right in the figure are $1, 4, 7, 8$ or $1, 2, 5, 8$.