#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main() {
    int n;
    cin >> n;

    int anagrami = 0;
    for(int i = 0; i < n; i++) {
        string a, b;
        cin >> a >> b;

        sort(a.begin(), a.end());
        sort(b.begin(), b.end());

        if(a == b) {
            anagrami++;
        }
    }

    cout << anagrami << endl;

    return 0;
}