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 C (judge verdict: Time Limit Exceeded)

#include<stdio.h>

int main(){
  int suji;
  char moji;

  while(1)
    { 
      scanf("%c",&moji);
      
      if(moji == '.')
	{
	  printf(".");
	  break;
	}
      if(moji == ' ')
	{
	  printf(" ");
	  continue;
	}
      if(moji == ',')
	{
	  printf(",");
	  continue;
	}
      
      suji = (int)moji;
      if(suji >= 97)
	{
	  suji -= 32;
	}
      else
	{
	  suji += 32;
	}
      moji = (char)suji;
      printf("%c",moji);
    }
  printf("\n");
}