1170: 字符串正反连接

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:3037 Solved:2650

Description

所给字符串正序和反序连接,形成新串并输出

Input

任意字符串(长度<=50)

Output

字符串正序和反序连接所成的新字符串

Sample Input Copy

123abc

Sample Output Copy

123abccba321