#include <stdio.h>
#include <ctype.h>

void CapsLock() {
    
    int x;         
    int numlines = 0;  

    while ((x = getchar()) != EOF) {

        if (x == '\n') {
            putchar('\n');
            numlines++;
        }
        else if (islower(x)) {
            putchar(toupper(x));
        }
        else if (isupper(x)) {
            putchar(tolower(x));
        }
        else if (isprint(x) || x == '\t') {
            putchar(x);
        }
    }

    printf("\nLines count: %d\n", numlines);
}

int main() {
    CapsLock();   
    return 0;
}