Problem:
Toggling Cases

Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

Input

A string is given in a line.

Output

Print the converted string in a line. Note that you do not need to convert any characters other than alphabetical letters.

Constraints

The length of the input string < 1200

Sample Input

fAIR, LATER, OCCASIONALLY CLOUDY.

Sample Output

Fair, later, occasionally cloudy.

Solution in Ruby (judge verdict: Accepted)


str = gets.chomp.split("")
str_downcase = []
str_upcase = []

str.each do |val|
  str_downcase << val.downcase
end

str.each do |val|
  str_upcase << val.upcase
end

ans = []

str.each_with_index do |val, ind|
  if val != str_upcase[ind]
    ans << str_upcase[ind]
  else
    ans << str_downcase[ind]
  end
end

puts ans.join