1954C-LongMultiplication.cpp

#include <iostream>

int main(){

    long t; std::cin >> t;
    while(t--){
        std::string x, y; std::cin >> x >> y;

        bool diff(false);
        for(long p = 0; p < x.size(); p++){
            if(x[p] == y[p]){continue;}
            else if(!diff){
                diff = true;
                if(x[p] < y[p]){char tmp = x[p]; x[p] = y[p]; y[p] = tmp;}
            }
            else if(x[p] > y[p]){char tmp = x[p]; x[p] = y[p]; y[p] = tmp;}
        }

        std::cout << x << std::endl << y << std::endl;
    }

}