#include <stdio.h>
int main(){
	int r = 0;
	int counter = 0;
while(r != EOF){
	r = getchar();
	if(r == EOF){
		
		break;
	}
	
	if (r == '\n'){
		counter ++;
	}

	if(r >= 'a' && r <= 'z'){
	r -= 32;
	}
	else if(r >= 'A' && r <= 'Z'){
		r += 32;
	}
putchar(r);
}
printf("\nPočet riadkov: %d\n");
return 0;
}