#include <iostream>
#include <math.h>
using namespace std;

int main(int argc,int *argv[])
{
    int a,b,i,j;
    cout<<"输如最小数值:";
    cin>>a;
    cout<<"输出最大数值:";
    cin>>b;
    for(i=a;i<=b;i++)
    {
        for(j=2;j<=sqrt(i);j++)
            if(i%j==0)
            break;
        if(j>=sqrt(i)+1)
            cout<<i;
    }
    return 0;
}