#include <stdio.h>
#include "pico/stdlib.h"
#include "pico/bootrom.h"

int main() {
    stdio_init_all();

    while (true) {
        int c = getchar_timeout_us(100000);
        if (c == 'p') {
            printf("p");
        } else if (c == 'b') {
            reset_usb_boot(0, 0);
        }
    }
}