#include <iostream>
using namespace std;
void solve(){
    int a,b,c;cin>>a>>b>>c;
    if(a==b && b==c){
        if(a >= 3)cout << 3 << endl;
        else cout << -1 << endl;
    }else if(a==c){
        if(a-1 == b){
            if(b==1){
                cout << -1 << endl;
            }else{
                cout << 2 << endl;
            }
        }else{
            cout << 1 << endl;
        }
    }else if(a==b){
        if(a>c){
            if(a-1==c){
                if(c==1){
                    cout << -1 << endl;
                }else{
                    cout << 2 << endl;
                }
            }else{
                cout << 1 << endl;
            }
        }else{
            if(a==1){
                cout << -1 << endl;
            }else{
                cout << 1 << endl;
            }
        }
    }else if(b==c){
        if(a<c){
            if(a==c-1){
                if(a==1){
                    cout << -1 << endl;
                }else{
                    cout << 2 << endl;
                }
            }else{
                cout << 1 << endl;
            }
        }else{
            if(c==1){
                cout << -1 << endl;
            }else{
                cout << 1 << endl;
            }
        }
    }else{
        if((a>b && b<c) || (a<b&&b>c)){
            cout << 0 << endl;
        }else{
            if(a>b)swap(a,c);
            int ans = -1;
            if(b-a == 1){
                if(a!=1){
                    ans = c-a+1;
                }
            }else{
                ans = c-b+1;
            }
            if(a!=1){
                if(ans!=-1){
                    ans = min(ans,b-a+1);
                }else{
                    ans = b-a+1;
                }
            }
            cout << ans << endl;
        }
    }
}
int main(){
    int n;cin>>n;
    for(int i = 0; n > i; i++){
        solve();
    }
}