A.cpp

/*****                                            
 *                                                   __Bismillahir Rahmanir Rahim__
 *                                          American International University Bangladesh (AIUB) 
 *                                                         Hadiur Rahman Nabil
                                                                 
                                                               
                                                          
*****/
#include <bits/stdc++.h>
using namespace std;

#define endl '\n'

typedef long long ll;
typedef long double ld;

//Palindrome--
// for(int i=s.size()-1;i>=0;--i){s_rev.push_back(s[i]);} if(s==s_rev)    
 //Anagram--
 //sort(a.begin(), a.end());sort(b.begin(), b.end());if(a==b)
  
//Find_Last + Delete_Last--
//num%10    +   num/10
//Fibonacci--
//for(int i=1;i<=N-2;i++){ num3=num1(1)+num2(2);num1=num2;num2=num3(Fibonacci);





  


    int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
 
    ll t,a,b,mv,ex;
    cin>>t;
    for(int i=1;i<=t;i++)
    {
        cin>>a>>b;
        if(a==b)
        {
            mv=0;
            ex=0;
        }
        else{
            ll maxn= max(a,b);
            ll minn= min(a,b);
            ex= maxn-minn;

            if(minn%ex==0)
            {
                mv=0;
            }
            else
            {
                mv = min(ex - minn % ex, minn %ex);
            }

            
        }
        cout<<ex <<" "<<mv <<"\n";
        

        
    }
    

    

  
    
    
    
}