#include <iostream>
#include <vector>
#include <algorithm>
#include <cstdint>

uint32_t read_uint()
{
    uint32_t n = 0;
    std::cin >> n;
    return n;
}

uint32_t reverse_int(uint32_t input)
{
    auto input_string = std::to_string(input);
    std::reverse(input_string.begin(), input_string.end());
    return stoi(input_string);
}

uint32_t add_reversed_numbers(uint32_t input_0, uint32_t input_1)
{
    auto in_0 = reverse_int(input_0);
    auto in_1 = reverse_int(input_1);

    return reverse_int(in_0 + in_1);
}

int main(int argc, char **argv)
{
    std::ios_base::sync_with_stdio(0);

    uint32_t test_count = read_uint();

    for(uint32_t i = 0; i < test_count; ++i)
    {
        std::cout << add_reversed_numbers(read_uint(), read_uint()) << std::endl;
    }

    return 0;
}