#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(void){
    int i;
    srand(time(NULL));
    for ( i = 0; i < 10; ++i )
        printf("%d\n", 2*(rand()%5+1));

    return 0;
}

10
4
6
10
6
6
6
10
8
10