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

	if(r >= 64 && r <= 91){
	r = r + 32;
	}
	else if(r >= 96 && r <= 123){
		r = r - 32;
	}

}
printf("\nPočet riadkov: %d\n, counter");
return 0;
}