#include <bits/stdc++.h>
#define ll long long
using namespace std;
ifstream fin("pinex.in");
ofstream fout("pinex.out");
ll t, a, b;

int main() {
    fin >> t;
    while (t--) {
        fin >> a >> b;
        ll rez = 0;
        for (ll i = 1; i < a; ++i)
            if (__gcd(i, b) == 1)
                ++rez;
        fout << rez << "\n";
    }
    return 0;
}