#include <iostream>
#include <fstream>
using namespace std;
ifstream ka("pietre.in");
ofstream ki("pietre.out");
int a, b, t;
int main()
{
    ka >> t;
    for(int i = 1; i <= t; i++)
    {
        ka >> a >> b;
        if(a>b)
        {
            a += b;
            b = a - b;
            a -= b;
        }
        if(a == b-1 && a != 1)
            ki << 1;
        else
            ki << 2;
    }
}