#include <stdio.h>
#include <sys/wait.h>
#include <unistd.h>

main() {
    int p1, p2, i;
    while ((p1 = fork()) == -1)
        ;
    if (p1 == 0)
        for (i = 0; i < 50000; i++) printf("son%d\n", i);
    else {
        while ((p2 = fork()) == -1)
            ;
        if (p2 == 0)
            for (i = 0; i < 50000; i++) printf("daughter%d\n", i);
        else
            for (i = 0; i < 50000; i++) printf("parent%d\n", i);
    }
}