#include <iostream>using namespace std;

int main (){int a[100],n,x;int i,j,ok;cin>>n;for(i=0;i<n;i++)

cin>>a[i];for (i=0; i<n; i++){ok=1;for (j=2; j<=a[i]/2; j++)if (a[i]%j==0)ok=0;

if(ok==1){cin>>x;for (j=n; j>i; j--)a[j+1]=a[j];a[i+1]=x;i++;n++;}}for (i=0; i<n; i++)cout<<a[i]<<".";return 0;}