编写LISP函数解决Hanoi Tower(汉塔)问题。问题如下：梵塔内有A，B，C三个柱子，开始时A柱上有n个盘子，盘子大小不等，大的在下，小的在上。要把这n个盘子从A柱移到B柱，每次只允许移动一个盘子，且在移动过程中在3个柱子上都始终保持大盘在下，小盘在上。在移动过程中可以利用C柱，要求程序输出移动的步骤。-Write LISP function to solve the problem of Hanoi is Tower (Chinese tower). The questions are as follows: Brahma tower A, B, C, of ​ ​ the three columns, the beginning of the A pillar n plates, the plates of varying sizes, big next on. Take the n-plate from the A pillar to the B-pillar, only allowed to move a plate at a time during the move, always keep the market in the next three columns, small. During the move can take advantage of the C-pillar, steps for program output moving.