kucuk_harf

#include <stdio.h>
 int kucukh_harf(int c)

{
    if(c>='A'&&c<='Z')
	  return c+'a'-'A';
	else
	  return c;
}
	
   
	int main(void) 
	{
		int  a;
     scanf("%d",&a);
     printf("%c\n",kucukh_harf(a));	
	   return 0;
	}