问题描述：设计一个程序实现两个任意长的整数的求和运算。

基本要求：利用双向循环链表，设计一个实现任意长的整数进行加法运算的演示程序。要求输入和输出每四位一组，组间用逗号隔开。如：1，0000，0000，0000，0000。

-Problem Descr iption: Design a program to achieve the two arbitrary long integer summation operator. Basic requirements: the use of two-way circulation list, the design of a realization of arbitrary long integer addition operations for the demo program. Input and output requirements for each of four groups of groups separated by commas. Such as: 1,0000,0000,0000,0000.