#include<iostream>
using namespace std;
int main()
{
    int n,num,p=0,i,m,j=1;
    while(cin>>n&&n>1)
    {
        if(p)
            cout<<endl;
        cout<<"Case "<<j++<<"."<<endl;
        num=0;m=n;
        for(i=2;i<=m;i++)
        {
            if(n%i==0)
            {
                num++;
                n=n/i;
                i=i-1;
            }
            else if(num!=0)
            {
                cout<<i<<" "<<num<<" ";
                num=0;
            }
        }
        cout<<endl;
        p=1;
    }
    return 0;
}