#include <stdio.h>
#include <stdlib.h>


int main(){
	int inp_char;
	char out_char;
	int count_lines = 0;
	while(1){
		inp_char = getchar();
		if(inp_char >= 'A' && inp_char <= 'Z') out_char = inp_char + 32;
		else if(inp_char >= 'a' && inp_char <= 'z') out_char = inp_char - 32;
		else if(inp_char == EOF) break;
		else if(inp_char == '\n') {
			count_lines++;
			out_char = '\n';
		}
		else out_char = inp_char;
		putchar(out_char);
	}
	printf("\nPočet riadkov: %d\n",count_lines);
	return 0;
}