#include <unistd.h>

int main() {
    char buf[8];
    ssize_t got;
    while((got = read(0, buf, 4)) > 0) {
        write(1, buf, got);
        usleep(120*1000);
    }
    return 0;
}


    /*
    ssize_t got = read(0, buf, 8);
    while(got > 0) {
        write(1, buf, got);
        got = read(0, buf, 8);
    }
    */