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

int main(int argc, char *argv[])
{
    int first, second, low, high, i, flag;


    first = atoi(argv[1]);
    second = atoi(argv[2]);

    low = first;
    high=second;

    while (low < high)
    {
        flag = 0;

        for(i = 2; i <= low/2; ++i)
        {
            if(low % i == 0)
            {
                flag = 1;
                break;
            }
        }

        if ((flag == 0))
        {
            printf("%d,", low);
            //break;
        }

        ++low;
    }

    return 0;
}