#include<bits/stdc++.h>
using namespace std;
int n,a,bj[31],ps[31];
int main()
{
    cin>>n;
    for (int i=1;i<=n;i++)
        bj[i]=i;
    while (cin>>a)
    {
        if (a==-1)
            break;
        for (int i=1;i<=n;i++)
        {
            if (a==bj[i])
            {
                ps[i]++;
            }
        }
    }
    for (int i=1;i<=n;i++)
    {
        cout<<bj[i]<<" "<<ps[i]<<endl;
    }
    return 0;
}