#include <iostream>
#include <iomanip>

int main() {
    float sensorA, sensorB;
    std::cin >> sensorA >> sensorB;
    
    float temp = sensorA;
    sensorA = sensorB;
    sensorB = temp;
    
    std::cout << std::fixed << std::setpresision(1) << sensorA << std::endl;
    std::cout << std::fixed << std::setpresision(1) << sensorB << std::endl;
    
    return 0;
}