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Competitions

PP2. Week 4: March 29 - April 4

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"