/*
// n이 홀수일 때 로직 다시 짜기
#include <stdio.h>

int main() {
    int t;
    scanf("%d", &t);

    while(t--) {
        int n;
        scanf("%d", &n);

        int m=2*n*((3*n)/2);
        printf("%d\n", m);

        int x[3]={}, y[3]={2, 1, 2};
        for(int i=0; i<(3*n)/2; i++) {
            y[1]=2*i+2;
            y[0]=y[2]=2*i+1;
            for(int j=0; j<n; j++) {
                x[0]=x[1]=3*j+1; x[2]=3*j+2;
                y[1]=2*i+1;
                printf("%d %d %d %d %d %d\n", x[0], y[0], x[1], y[1], x[2], y[2]);
                x[0]++; x[2]++;
                x[1]+=2; y[1]++;
                printf("%d %d %d %d %d %d\n", x[0], y[0], x[1], y[1], x[2], y[2]);
            }
        }
    }
}
*/

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