Problem:
Reverse Sequence

Write a program which reverses a given string str.

Input

str (the size of str ≤ 20) is given in a line.

Output

Print the reversed str in a line.

Sample Input

w32nimda

Output for the Sample Input

admin23w

Solution in Ruby (judge verdict: WA: Presentation Error)

# 文字列入力
str = gets.to_s
# 21文字以上は弾いて再入力
while str.length > 21
str = gets.to_s
end
# 逆順出力
puts str.reverse