Repeat Each Character Twice

Given a string s, your task is to create a new string in which each character from s is repeated exactly twice. For example, if s = "hello", the output should be "hheelllloo".

The transformation can be formally expressed as follows: For the input string \( s = s_1 s_2 \ldots s_n \), the output string \( t \) is given by \( t = s_1 s_1 s_2 s_2 \ldots s_n s_n \).

You need to read the input from stdin and write the result to stdout.

inputFormat

The input consists of one line containing the string s. The string may include any visible characters. It may also be empty.

outputFormat

Output a single line containing the transformed string where each character of the input is repeated twice.

hello

hheelllloo