#include <stdio.h>

int main() {
    unsigned char first, second, third, fourth;
    scanf("%02hhu%02hhu%02hhu%02hhu", &first, &second, &third, &fourth);
    first += 'A' - 1;
    second += 'A' - 1;
    third += 'A' - 1;
    fourth += 'A' - 1;
    printf("%c%c%c%c\n", first, second, third, fourth);
    return 0;
}