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>
#include<ctype.h>

int main()
{
 char c;
 for(;;){
         scanf("%c",c);
         if(c=='\n'){printf("\n");
                     break;
                     }
                     else if(isupper(c)!=0)printf("%c",tolower(c));
                     else if(islower(c)!=0)printf("%c",toupper(c));
                     else printf("%c",c);
                     
         }

 return 0;
}