#include <stdio.h>
int main(){
char  word;
	
	for (int count = 0; (word = getchar()) != EOF;) {
			if (word >= 'a'&&word <= 'z') {
				word -= 32;
			}
			else if (word >= 'A'&&word <= 'Z'){
				word += 32;
			}
			if (word == '\n') {
				count++;
				printf("\nPočet riadkov: %d\n", count);
			}
			putchar(word);
			
		}
return 0;
}