APR_004

#include <stdio.h>

int main() {
    int i;
    float a,b,zam;
    for(i=0;i<10;i++) {
        scanf("%f %f", &a, &b); //a = 1, b = 2
        zam = a; //zam = 1, a = 1, b = 2
        a = b; //zam = 1, a = 2, b = 2
        b = zam; // zam = 1, a = 2, b = 1
        printf("%f %f \n", a,b);
    }
    return 0;
}