#include <stdio.h>
int main ( int argc , char * argv[] ) {
long long int t;
scanf("%lld" , &t);
while ( t-- ) {
long long int a3 , al3 , sum;
scanf("%lld%lld%lld" , &a3 , &al3 , &sum );
long long int n = ( 2 * sum ) / ( a3 + al3 ) ;
printf("%lld\n" , n);
long long int d = (al3 - a3)/(n-5);
long long int a1 = a3 - 2 * d;
int i;
printf("%lld " , a1);
for ( i = 1 ; i < n ; i++ ) {
a1 += d;
printf("%lld " , a1);
}
printf("\n");
}
return 0;
}
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