#include <sstream>
#include <iostream>
#include <vector>
 
using namespace std;
 
string reserveString(string x);
void split(vector<string> &result, string str, char delim );
int getNumberReductedZero(string number );
string removeLeadingZeros(string number);
 
int main() {
	int count;
 
    string integersArray[10000];
 
    cin >> count;
    for(int i=0; i<count; i++) {
        cin.sync();
        getline(cin, integersArray[i]);
    }
 
    for(int i=0; i<count; i++) {
        vector<string> splited;
        string reservedString = reserveString(integersArray[i]);
        split(splited, reservedString, ' ');
        int firstNumber = getNumberReductedZero(splited.at(0));
        int secondNumber = getNumberReductedZero(splited.at(1));
        int result = firstNumber + secondNumber;
        reservedString = to_string(result);
        reservedString = reserveString(reservedString);
        reservedString = removeLeadingZeros(reservedString);
        cout << reservedString << endl;
    }
	return 0;
}
 
 
string reserveString(string x){
    int length = x.length();
    string y;
    for(int i=0; i<length; i++) {
        y += x[length - 1 - i];
    }
    return y;
}
 
void split(vector<string> &result, string str, char delim ) {
    string tmp;
    string::iterator i;
    result.clear();
 
    for(i = str.begin(); i <= str.end(); ++i) {
        if((const char)*i != delim  && i != str.end()) {
            tmp += *i;
        } else {
            result.push_back(tmp);
            tmp = "";
        }
    }
}
 
int getNumberReductedZero(string number){
    number = removeLeadingZeros(number);
    return atoi(number.c_str());
}
 
string removeLeadingZeros(string number){
    return number.erase(0, min(number.find_first_not_of('0'), number.size()-1));
}
 

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