#include <iostream>
#include<cstdio>
using namespace std;
int main()
{
int times;
scanf("%d",×);
for ( int k = 0; k < times; k++ ) {
long long int a3,l4,s;
scanf("%lld",&a3);
scanf("%lld",&l4);
scanf("%lld",&s);
long long int n = 4;
double fx;
while ( fx != 0 ) {
if ( n == 6 ) {
n++;
}
fx = s - (n/2)* (a3 + l4 + ((l4 - a3)/(double)(n-6)) );
n++;
}
n = n-1;
printf("%ulld\n",n);
double d = (l4-a3)/(double)(n-6);
long long int a = a3 - (2*d);
for ( int i = 0; i < n ; i++ ) {
long long int k = a+i*d;
printf("%ulld",k);
printf(" ");
}
printf("\n");
}
return 0;
}