hdu 2105

#include <iostream>#include <stdio.h>using namespace std;int main(){    double a,b,c,d,e,f,t;    while(cin>>t){            if(t==0)  break;    else {    while(t--)    {        cin>>a>>b>>c>>d>>e>>f;        printf("%.1lf %.1lf\n",(a+c+e)/3.0,(b+d+f)/3.0);    }}}    return 0;}