e-olymp
Problems

Characters doubling

Characters doubling

Given a string consisting of lowercase Latin letters, punctuation marks and spaces. Double all Latin letters in it.

Input

One line, consisting of lowercase Latin letters, punctuation marks and spaces.

Output

Print a string with all doubled Latin letters.

Time limit 1 second
Memory limit 128 MiB
Input example #1
welcome to python!
Output example #1
wweellccoommee ttoo ppyytthhoonn!
Author Matviychuk Sergiy Volodymyrovych
Source "ABC programming"