#include<stdio.h>
#include<math.h>
int main()
{
int i,m,n,isPrime=1;
scanf("%d %d",&m,&n);
for(int i=m;i<=n;i++)
{
if(i==1)
{
continue;
}
isPrime=1;
for(int j=2;j<i;j++)
{
if(i%j==0)
{
isPrime==0;
break;
}
}
if(isPrime==1)
{
printf("%d\n",i);
}
}
}
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