In the college entrance examination, the eldest daughter is Dongdong, the second daughter is Xixi, the third daughter is Nannan, and the fourth daughter is Beibei, dad.
Before and after, before and after, before and after, east and west, north and south, north and south, but right, inside and outside, big and small, more and less, good and evil, square and circle, black and white, red and green, up and down, left and right, front and back, life and death, bitter and sweet, yin and yang, long and short, deep and shallow, fat and thin.