Description

Write a program to compute the friend string s1 of a given string s.
The friend string s1 is defined as follows:

• The first character of s1 is obtained by adding the ASCII values of the first and second characters of s.
• The second character of s1 is obtained by adding the ASCII values of the second and third characters of s.
• This process continues until the second-to-last character of s.
• The last character of s1 is obtained by adding the ASCII values of the last character of s and the first character of s.

Input Format

Input consists of one line containing a string with a length between 2 and 100 (inclusive). The ASCII value of each character in the string does not exceed 63.

Output Format

Output one line, the transformed friend string. It is guaranteed that the output will consist of a single line.

1234

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