利用串的块链存储结构实现1）两个子串的连接；2）输出串：输出连接前两个串和连接后的新串。

要求：两个子串从键盘输入获得；从屏幕显示连接后的新串元素列表

-The use of string storage structure of the block chain to achieve a) two sub-strings of connection　2) Output string: output to connect the first two strings, and connected to a new string.

Requirements: two sub-strings from the keyboard input received　from the screen displays the connection string element of the new post list