#include<bits/stdc++.h>
using namespace std;
typedef     long long       ll;
typedef         long double      dl;
#define     pb              push_back
#define     PB              pop_back
#define     nn              "\n"
#define     O_O             ios_base::sync_with_stdio(false); cin.tie(NULL)
#define     all(p)          p.begin(),p.end()
#define     zz(v)           (ll)v.size()
#define     ss              ' '
#define         arrsize(a)      (sizeof(a)/sizeof(a[0]))
//#define       arrsize(a)      (sizeof(a)/sizeof(*a))
#define     S(a)            scanf("%lld",&a)
#define     SS(a,b)         scanf("%lld %lld",&a,&b)
#define     SSS(a,b,c)      scanf("%lld %lld %lld",&a,&b,&c)
#define     gcd(a,b)        __gcd(a,b)
#define     lcm(a,b)        (a*b)/gcd(a,b)
#define     pi              acos(-1.0)
typedef        pair <int, int>   pii;
typedef       pair <ll, ll>      pll;
typedef      vector< pair <ll, ll> >      vpll;
typedef     vector<ll>      vll;
typedef     map<string,ll>      msl;
typedef     map<ll,ll>      mll;
#define MAX 1000005


int main()
{
 //O_O ;
   ll t;
   cin>>t;
   while(t--){
        ll a,b;
     cin>>a>>b;
     ll m=a+b;
  if(a>9&&b>9){
  ll a1=a/10,a2=a%10, b1=b/10,b2=b%10;

       m=max(m,((a1*10)+b1+(a2*10)+b2));
        ll ans=max(m,((b1*10)+a1+(b2*10)+a2));
      cout<<ans<<nn;
    }
 else if(b>9&&a<=9){
      ll  b1=b/10,b2=b%10,a1=a;
     if(a1>b1) swap(a1,b1);
         //  cout<<a1<<ss<<b1<<ss<<b2;
    ll ans=(a1+(b1*10)+b2);
    cout<<ans<<nn;
 }
 else if(a>9&&b<=9){
    ll  a1=a/10,a2=a%10,b1=b;
      if(a1<b1) swap(a1,b1);
     ll ans=((a1*10)+a2+b1);
     cout<<ans<<nn;
 }
 else
    cout<<a+b<<nn;

   }
    return 0;

}